Refereed Publications/Journals Johnson, R.E. and P.J. Huggins, “Toroidal Atmosphere around Extrasolar Planets”, Astron. Soc. of the Pacific (2006) submitted. Johnson. R.E., H.T. Smith, O.J. Tucker, M. Liu and R. Tokar, “The Enceladus and OH Tori at Saturn”, Astrophys. J. Letts (2006) submitted Crary, F.J. et al., “Dynamics and Composition of Plasma in and around Titan”, Science (2006) submitted. Sittler, E.C. Jr., M. Thomasen, R.E. Johnson et al., “Cassini observations of Saturn’s inner plasmasphere: Saturn orbit insertion results”, J. Geophys. Res. (2006) in press Sittler, E.C., R.E. Johnson, H.T. Smith, J.D. Richardson, S. Jurac, M. Moore, J.F. Cooper, B.H. Mauk, M. Michael, C. Paranicas, T.P. Armstrong, and B. Tsurutani, “ Energetic Nitrogen Ions within the Inner Magnetosphere of Saturn”, J. Geophys. Res. (2006) in press. Hartle, R.E., E.C. Sittler, F.M. Neubauer, R.E. Johnson, H.T. Smith, F. Crary, D.J. McComas, D.T. Young, A.J. Coates, D. Simpson, S. Bolton, D. Reisenfeld, K. Szego, J.J. Berthelier, A. Rymer, J. Vilppola, J.T. Steinberg, N. Andre, “Preliminary Interpretation of Titan Plasma Interaction as Observed by the Cassini Plasma Spectrometer: Comparisons with Voyager 1”, GRL (2006) in press. Tokar, R.L, R.E. Johnson, T.W. Hill, D.H. Pontius, W.S. Kurth, F.J. Crary, D.B. D.T. Young, F. Thomsen, D. B. Reisenfeld, A.J. Coates, G. R. Lewis, E.C. Sitter, D.A. Gurnett, “The Interaction of the Atmosphere of Enceladus with Saturn’s Plasma”, Science 311, 1409- 1412 (2006) Johnson, R.E., J.G.Luhmann, R.L. Tokar, M. Bouhram, J.J. Berthelier, E.C. Sittler, J.F. Cooper, T.W. Hill, H.T. Smith, M. Michael, M. Liu, F.J. Crary, and D.T. Young, “Production, ionization and redistribution of O2 Saturn’s ring atmosphere”, Icarus180, 393-402 (2006) Luhmann, J.G, R.E. Johnson, R.L. Tokar, T. Cravens, “A model of the ionosphere of Saturn’s toroidal ring atmosphere”, Icarus 181, 465-474 (2006) Tucker, O.J., D.S. Ivanov, R.E. Johnson, L.V. Zhigilei, and E.M. Bringa, “Molecular dynamics simulation of sputtering from a cylindrical track: EAM versus pair potentials”, Nucl. Instrum. Methods B 228, 163-169 (2005) Shematovich, V.I., R.E. Johnson, J.F. Cooper, and M.C. Wong, “Surface- bounded atmosphere of Europa”, Icarus 173, 480-498 (2005) Young, D. T., et al. “Composition and dynamics of plasma in Saturn’s magnetosphere”, Science 307, 1262-1266 (2005) Sittler, E. C., Hartle, R. E., Viñas, A. F., Johnson, R. E., Smith, H. T. and I. MuellerWodarg, “Titan interaction with Saturn’s magnetosphere: Voyager 1 results revisited”, J. Geophys. Res. 110 (A9) doi: 10.1029/2004JA010759 (2005) Michael M., R.E. Johnson, F. Leblanc, M. Liu, J.G. Luhmann, and V.I. Shematovich, “Ejection of nitrogen from Titan’s atmosphere by magnetospheric ions and pick-up ions”, Icarus 175, 263-267 (2005) Smith, H.T., M. Shappirio, E.C. Sittler, D. Reisenfeld, R.E. Johnson, R.A. Baragiola, F.J. Crary, D.J. McComas, and D.T. Young, “Discovery of nitrogen in Saturn's inner magnetosphere”, GRL 32, L14S03, doi:10.1029/2005GL022654 (2005) Coates, A.J. et al., “Plasma electrons above Saturn’s main rings: CAPS observations”, GRL 32, L14S09, doi:10.1029/2005GL022694 (2005) Sittler, E.C. Jr., et al., “Preliminary results on Saturn's inner plasmasphere as observed by Cassini: Comparison with Voyager”, GRL 32, L14S0 doi:10.1029/2005GL022653 (2005) Tokar, R.L., R.E. Johnson et al., “Cassini observations of the thermal plasma in the vicinity of Saturn’s main rings and the F and G rings”, GRL 32, L14S04, doi:10.1029/2005GL022690 (2005) Cassidy, T.A. and R.E. Johnson, “Monte Carlo madel of sputtering and other ejection processes within a regolith”, Icarus 176, 499-507 (2005) Szego, K. et al., “The global plasma enviromentt of Titan as observed by Cassini Plasma Spectrometer during the first two close encounters with Titan”, GRL 32, L20s05, doi:10.1029/2005GL022646 (2005) Carlson, R.W, M.S. Anderson, R. Mehlman, R.E. Johnson, “Distribution of hydrate on Europa: Futher evidence for sulfuric acid hydrate”, Icarus 77, 461-471 (2005) Leblanc, F, A. Potter, R. killen, and R.E. Johnson, “Origins of Europa Na cloud and torus”, Icarus 178, 367-385 (2005) Elsner, R.F., B.D. Ramsey, J.H. Waite, Jr., P. Rehak, R.E. Johnson, J.F. Cooper, and D.A. Swartz, “X-ray probes of magnetospheric interactions with Jupiter’s auroral zones, the Galilean satellites, and the Io plasma torus”, Icarus 178, 417-428 (2005) Johnson, R.E., M. Liu, and E.C. Sittler, “Plasma-Induced clearing and redistribution of material embedded in planetary magnetospheres”, GRL 32, L24201 doi:10.1029/2005GL024275 (2005) Michael, M. and R.E. Johnson, “Energy deposition of pickup ions and heating of Titan's atmosphere”, Planetary & Space Sci.53, 1510-1514 (2005) Luna, H., C. McGrath, M.B. Shah, R.E. Johnson, M. Liu, C.J. Latimer, and E.C. Montenegro, “Dissociative Charge Exchange and Ionization of O2 by fast H+ and O+ ions: Energetic Ion Interactions in Europa’s Oxygen Atmosphere and Neutral Torus”, Astrophys. J. 628, 1086-1096 (2005) Johnson, R.E., P.D. Cooper, T.I. Quickenden, G.A. Grieves, T.M. Orlando, “Production of oxygen by electronically induced dissociations in ice”, J. Chem. Phys. 123, 184715-1-8 (2005) Sittler, E.C. Jr., R.E. Hartle, A.F. Vinas, R.E. Johnson, H.T. Smith, and I. Mueller- Wodarg, “Titan interaction with Saturn’s magnetosphere: Voyager 1 results revisited”, JGR 110, A09302,doi:101029/2004JA010759 (2005) Funsten, H.O., S.M. Ritzau, R.W. Harper, J.E. Borovsky, and R.E. Johnson, “Energy loss by keV ions in silicon”, Phys. Rev. Letter 92, 213201-1-4 (2004) Johnson. R.E., “ The magnetospheric plasma-driven evolution of satellite atmospheres”, Astrophys. J. 609, L99-L102 (2004) Smith, H.T., R.E. Johnson, and V.I. Shematovich, “Titan’s atomic and molecular nitrogen tori”, Geophys. Res. Lett. 31, L16804, doi:10.1029/2004GL020580 (2004) Burger, M.H. and R.E. Johnson, “Europa’s neutral cloud: morphology and comparison to Io”, Icarus 171, 557-560 (2004) Anders, C., H. M. Urbassek, and R. E. Johnson, “Linerity and additivity in clusterinduced sputtering: A molecular-dynamics study of van der Waals bonded systems”, Phys. Rev. B 70, 155404-1 – 4 (2004) Sittler, E. C., R. E. Johnson, S. Jurac, J. D. Richardson, M. McGrath, F. Crary, D.T. Young, and J. Nordholt, “Pickup ions at Dione and Enceladus: Cassini Plasma Spectrometer Simulation”, JGR 109, A01214, doi:10.1029/2002JA9647 (2004) Bringa, E.M. and R.E. Johnson, “A new model for cosmic-rays ion erosion of volatiles from grains in the interstellar medium”, Astrophys. J. 603, 159-164 (2004) Leblanc, F., J.G. Luhmann, R.E. Johnson, and M. Liu, “Solar energetic particle event at Mercury”, Planetary and Space Science 51, 339-352 (2003) Johnson, R.E., T. I. Quickenden, P.D. Cooper, A.J. McKinley, and C. Freeman, “The production of oxidants in Europa’s surface”, Astrobiology 3, n4, 823-850 (2003) Cooper, P. D., R. E. Johnson, and T. I. Quickenden, “A review of possibly optical absorption features of oxygen molecules in icy surfaces of outer solar system bodies”, Planet. Space Science 51, 183-192 (2003) Luna, H., M. Michael, M.B. Shah, R.E. Johnson, C.J. Latimer, and J.W. McConkey, “Dissociation of N2 in capture and ionization collisions with fast H+and N+ ion and modeling of positive ion formation in the Titan atmosphere” J. Geophys. Res. 108, 10.1029/2002JE001950 (2003) Shematovich, V.I., R.E. Johnson, M. Michael, and J.G. Luhmann, “Nitrogen loss from Titan”, JGR 108, No. E8, 5087, doi:10.1029/2003JE002094 (2003) Cooper, P. D., R. E. Johnson, and T. I. Quickenden, “Hydrogen peroxide dimers and the production of O2 in icy satellite surfaces”, Icarus 166, 444-446 (2003) Leblanc, F. and R.E. Johnson, “Mercury’s sodium exosphere”, Icarus 164, 261-281 (2003) Strazzulla, G., J.F. Cooper, E.R. Christian, and R.E. Johnson, “Ion irradiation of TNOs: from the fluxes measured in space to the laboratory experiment”, Comp. Ren. Physique 1 791-801 (2003) Leblanc, F., D. Delcourt, and R.E. Johnson, “Mercury’s sodium exosphere: magnetosheric ion recycling”, JGR-Planets 108, no. E12, 5136, doi:10.1029/ 2003JE002151 (2003) Leblanc, F. and R.E. Johnson, “Role of Molecules in Pick-up Ion Sputtering of the Martian Atmospheric”, J. Geophys. Res-Planet. 107, 5-1- 6 (2002) Johnson, R.E., M. Liu, and C. Tully, “Collisional Dissociations Cross Sections for O+ O2, CO and N2, O2+O2, N+N2, N2+N2”, Planetary and Space Science 50, 123-128 (2002) Bringa, E.M., R.E. Johnson, and R.M. Papaléo, “Crater Formation by Single ions in the Electronic Stopping Regime: Comparison of Molecular Dynamics with Experiments on Organic Films”, Phys. Rev B 65,. 094113-1-8 (2002) Bringa, E.M. and R.E. Johnson, “Coulomb Explosion and Thermal Spikes”, Phys. Rev. Lett. 88, 165501-1- 4 (2002) Johnson, R.E., F. Leblanc, B.V. Yakshinskiy, and T.E. Madey, “Energy Distributions for Desorption of Sodium and Potassium from Ice: the Na/K ratio at Europa”, Icarus 156, 136142 (2002) Paranicas, C., B.H. Mauk, J.M. Ratliff, C. Cohen, and R.E. Johnson, “The Ion Evironment Near Europa and Its Role in Surface Energetics”, Geophys. Res. Letts. 29, 18-1 – 4 (2002) Leblanc, F., J.G. Luhmann, R.E. Johnson, and E. Chassefiere, “Some Expected Impacts of a Solar Energetic Event at Mars”, J. Geophys. Res. 107, 10.1029/2001JA900178 (2002) Elsner, R.F., G.R. Gladstone, J.H. Waite, F.J. Crary, R.R. Howell, R.E. Johnson, P.G. Ford, A.E. Metzger, K.C. Hurley, E.D. Feigelson, G.P. Garmire, A. Bhardwaj, D.C. Grodent, A.F. Tennant, and M.C. Weisskopf, “Discovery of Soft X-Ray Emission from Io, Europa, and the Io Plasma Torus”, Astrophys. J. 572, 1077-1082 (2002) Leblanc, F., R.E. Johnson and M.E. Brown, “Europa’s sodium atmosphere: an ocean source?”, Icarus 159, 132-144 (2002) Tully, C. and R.E. Johnson, “Semiclassical calculation of collisional dissociation cross Section for N + N2”, J. Chem. Phys. 117, 6556-6561 (2002) [“Erratum: J. Chem. Phys. 119, 10452-10453 (2003)] Jakas, M.M., E.M. Bringa, and R.E. Johnson, “Fluid dynamics calculation of Sputtering from a cylindrical thermal spike”, Phys. Rew B65, 165425-1-9 (2002) Jurac, S., M.A. McGrath, R.E. Johnson, J.D. Richardson, V.M. Vasyliûnas, and A. Eviatar, “Saturn: Search for a missing water source”, Geophys. Res. Lett. 29, 2172, 25-1 – 4 (2002) Bringa, E.M. and R.E. Johnson, “Sputtering of nano-grains by energetic ions”, Nucl. Instrum. Meth. , in Phys. Res. B 193/194, 365 (2002) Bringa, E.M., E. Hall, R.E. Johnson, and R. Papaleo, “Crater formation by ion bombardment as a function of incident angle”, Nucl. Instrum. Meth. , in Phys. Res. B193/194 , 747 (2002) Carlson, R.W., M.S. Anderson, R.E. Johnson, M.B. Schulman, and A.H. Yavouian, “Sulfuric acid production on Europa: The radiolysis of sulfur in water ice”, Icarus 157 456-463 (2002) Jurac, S., R.E. Johnson, J.D. Richardson, “Saturn’s E ring and Production of the Neutral Torus”, Icarus 149, 384-396 (2001) Cooper, J.F., R.E. Johnson, B.H. Mauk, H.B. Garrett, and N. Gehrels, “Energetic ion and electron irradiation of the Icy galilean satellites”, Icarus 149, 133-159 (2001) . Paranicas, C., R.W. Carlson and R.E. Johnson, “Electron Bombardment of Europa”, Geophys. Res. Lett. 28, 673-676 (2001) Jurac, S., R.E. Johnson, J.D. Richardson, C.Paranicas, “Satellite Sputtering in Saturn’s Magnetosphere”, Planet and Space Sci. 49, 319-326 (2001) Tully, C. and R.E. Johnson, “Low Energy Collisions Between Ground State Oxygen Atoms”, Planetary and Space Science 49, 533-537 (2001) Leblanc, F. and R.E. Johnson, “Sputtering of the Martian Atmosphere by Solar Wind Pick -up Ions”, Planetary and Space Science 49, 645-656 (2001) Bringa, E.M. and R.E. Johnson, “Angular Dependence of the Sputtering Yield from a Cylindrical Track”, Nucl. Instrum. Method B180, 99-104 (2001) Johnson, R.E. and F. Leblanc, “The Physics and Chemistry of Sputtering by Energetic Plasma Ions”, Astrophysics and Space Science 277, 259-269 (2001) Shematovich, V.I., C. Tully and R.E. Johnson, “Suprathermal Nitrogen Atoms and Molecules in Titan’s Corona”, Adv. Space Res. 27, 1875-1880 (2001) Shematovich, V.I. and R.E. Johnson, “Near-Surface Oxygen Atmosphere at Europa”, Adv. Space Res. 27, 1881-1888 (2001) Johnson, R.E., D. Schnellenberger, M.C. Wong, “ The sputtering of an oxygen thermosphere by energetic O+ ”, J. Geophys. Res. 105, 1659-1670 (2000) Johnson, R.E., “Sodium at Europa”, Icarus 143, 429-433 (2000) Bringa, E. M., M. Jakas and R.E. Johnson, “Spike models for sputtering: effect of the surface and the material stiffness”, Nucl. Instrum. Methods B164-165, 762-771 (2000) Bringa, E.M. and R.E. Johnson, “Electronic Sputtering of Solid O2”, Surface Science 451,108-115 (2000) Johnson, R.E., “Comment on Laboratory Studies of the Optical Properties and Stability of Oxygen on Ganymede”, J. Geophys. Res. 104(E6), 14179-14182 (1999) Dutkiewicz, L., R.E. Johnson, R. Pedrys, and A. Vertes, “Molecular Dynamics Calculation of the Vibrational Excitation Dynamics and Desorption in Solid O2”, J. Phys.Chem 103, 2925-2933 (1999) Bringa, E. M. and R.E. Johnson, “Molecular Dynamics Study of Non-equilibrium Energy Transport from a Cylindrical Track II. Models for the Sputtering Yield”, Nucl. Instrum. Methods.152, 267-290 (1999) Carlson, R.W., M.S. Anderson, R.E. Johnson, W.D. Smythe, A.R. Hendrix, C.A. Barth, L.A. Soderblom, G.B. Hansen, T.B. McCord, J.B. Dalton, R.N. Clark, A.C. Ocampo, J.H. Shirley, and D.L. Matson, “Hydrogen Peroxide on the Surface of Europa”, Science 283, 2062-2064 (1999) Carlson, R.W., R.E. Johnson and M.S. Anderson, “ Sulfuric Acid on Europa and the Radiolytic Sulfur Cycle”, Science 286, 97-99 (1999) Bringa, E. M., R.E. Johnson, and M. Jakas, “Molecular Dynamics Simulation of Electronic Sputtering from a Cylindrical Track”, Phys. Rev B 60, 15107-15116 (1999) Johnson, R.E., “Stimulated Desorption of Atoms and Molecules from Bodies in the Outer Solar System”, Brazilian J. Phys. 29, 444-449 (1999) Johnson, R.E. and J.G. Luhmann, “Sputtering contribution to the atmospheric corona on Mars”, J.Geophys. Res. 103, 3649-3653 (1998) Johnson, R.E. and M. Liu, “Sputtering of the atmosphere of Mars 1. Collisional dissociation of CO2”, J. Geophys. Res. 103, 3639-3647 (1998) Madey, T.E., B.V. Yakshinskiy, V.N. Ageev, and R.E. Johnson, “Desorption of alkali atoms and ions from oxide surfaces: Relevance to origins of Na and K in atmospheres of Mercury and the Moon”, J. Geophys. Res. 103, 5873-5888 (1998) Dutkiewicz, L., R.E. Johnson, R. Pedry, “Molecular Dynamics Study Laser-Induced Desorption and Vibrational Relaxation in Solid Oxygen”, J. Low-Temp. Physics 111, 747756 (1998) Johnson, R.E. and Y. Lebeyec, “Angular Distribution of the Ejecta in Matrix-Assisted Desorption/ Ionization: Model Dependence”, Int. J. of Mass Spectrom.177, 111-118 (1998) Johnson, R.E., R.M. Killen, J.H. Waite, W.S. Lewis, “Europa’s Surface and SputterProduced Ionosphere”, Geophys. Res. Letts.25, 3257-3260 (1998) Cooper, J.F., E.R. Christian, R.E. Johnson, “Heliospheric Cosmic Ray Effects on Kuiper Belt Objects”, Ad. Space Res. 21, 1611-1614 (1998) Jurac, S., R.E. Johnson and B. Donn, “Monte Carlo calculation of Enhancement in the Sputtering of Small Grains”, Astrophys. J. Lett. 503, 247-252 (1998) Bringa, E. M. and R.E. Johnson, “Molecular Dynamics Study of Non - equilibrium Energy Transport from a Cylindrical Track I. Test of “spike” models”, Nucl. Instrum. Meth. B143, 513-535 (1998) Daya, D., P. Demirev, J. Eriksson, A. Hallen, P. Hakansson, R.E. Johnson, J. Kopiniczky, R.M. Papaleo, C.T. Reimann, J. Rottler, B.U.R. Sundqvist , “Interaction of MeV Atomic Ions with Molecular Solids: Ion Track Structure and Sputtering”, Radiat. Research 28, 101110 (1997) Johnson, R.E. and W.A. Jesser, “O2/O3 Micro-atmospheres in the Surface of Ganymede”, Astrophys. J. Letts. 480, L79-L82 (1997) Noll, K.S., R.E. Johnson, M.A. McGrath and J.J. Caldwell, “Detection of SO2 on Callisto with the Hubble Space Telescope”, GRL 24, 1139-1142 (1997) Johnson, R.E., “Polar ‘Caps’ on Ganymede and Io Revisited”, Icarus 128, 469-471 (1997) Noll, K.S., T.L. Rousch, D.P. Cruikshank, R.E. Johnson, Y.J. Pendleton, “Detection of ozone on Saturn’s satellites Rhea and Dione”, Nature 388, 45-47 (1997) Johnson, R.E. and T.I. Quickenden, “Photolysis and Radiolysis of Water Ice on Outer Solar System Bodies”, J. Geophys. Res.102, 10985-10996 (1997) Calvin, W., J. Spencer, and R.E. Johnson, “O2 on Ganymede: spectral characteristics and plasma fromation mechanism”, Geophys. Res. Lett 23, 673-676 (1996) Pospieszalska, M. and R.E. Johnson, “Monte Carlo Calculation of the Sputtering of Io's Atmosphere”, J. Geophys. Res. 101, 7565-7573 (1996) Johnson, R.E. and M. Liu, “The Loss of Atmosphere from Mars”, Science 274, 1932 (1996) Clark, B.E. and R.E. Johnson, “Interplanetary Weathering: Surface Erosion in Outer Space”, EOS Trans. 77, 141-145 (1996) Papaleo, R.M. L.Farenza, A. Hallen, M.A.D. Arajo, R.P. Livi, B.U.R Sundqvist, and R.E. Johnson, “Chemical Degradation of PPS by Fast Ions: Dependence on Primary Stopping Power”, Phys. Rev. B 53, 2303-2313 (1996) Johnson, R.E. and M. Liu, “Molecular Dynamics Studies of Minicascades in Electronicallystimulated Sputtering of Condensed-gas Solids”, J. Chem. Phys. 104, 6041-6051 (1996) Johnson, R.E., “Sputtering of Ices in the Outer Solar System”, Rev. Mod. Phys. 68, 305-312 (1996) Noll, K.S., R.E. Johnson, A.L. Lane, D. Dominque, and H.A. Weaver, “Detection of Ozone on Ganymede”, Science 273, 607-670 (1996) Papaleo, R.M., P. Demirev, J. Eriksson, P. Hakansson, B.U.R. Sundqvist and R.E. Johnson, “Measurement of MeV Ion Track Structure in Organic Solids”, Phys. Rev. Lett 77, 667-670 (1996) Wong, M. and R.E. Johnson, “A 3-D Azimuthally Symmetric Model Atmosphere for Io. 1: Photochemistry and the Accumulation of a Nightside Atmosphere”, J. Geophys. Res. 101, 23243-23254 (1996) Wong, M.C., and R.E. Johnson, “A 3-D azimuthally symmetric model atmosphere for Io: II Plasma effect on the surface”, J. Geophys. Res. 101, 23255-23259 (1996) Westley, M., R.A. Baragiola, R.E. Johnson, and G. Baratta, “Photo desorption from low temperature water ice: Astrophysical Implications”, Nature 373, 405-407 (1995) Wong, M. and R.E. Johnson, “The effect of plasma heating on sublimation-driven flow at Io”, Icarus 115, 109-118 (1995) Jurac, S., R.E. Johnson, R.A. Baragiola and E.C. Sittler, “Charging of ice grains by lowenergy plasma? Aplication to Saturn’s E ring”, J. Geophys. Res. 100, 14,821-14,831 (1995) Shi, M., R.A. Baragiola, D.E. Grosjean, R.E. Johnson, S. Jurac, and J. Schou, “Sputtering of Water Ice Surfaces and the Production of Extended Neutral Atmospheres”, J. Geophys. Res. 100, 26,387-26,395 (1995) Westley, M.S., R.A. Baragiola, R.E. Johnson, and G.A. Barratta, “Ultraviolet Photodesorption from Water Ice”, Planet. Space Sci. 43, 1311-1315 (1995) Urbassek, H.M., H. Kafemann, and R.E. Johnson, “Atom ejection from a fast-ion track: A molecular dynamics study”, Phys. Rev. B 49, 786-795 (1994) Jakosky, B., R. Pepin, R.E. Johnson and J. Fox, “Mars Atmospheric Loss and Isotopic Fractionation by Solar-Wind-Induced Sputtering and Photochemical Escape”, Icarus 111, 271-288 (1994) Johnson, R.E., “Formation of Na-containing Molecular Ions at Io”, Icarus 111, 65-72 (1994) Johnson, R.E., “Models for Laser Desorption Mass Spectrometry”, Int. J. Mass. Spec. and Ion Phys. 139, 25-38 (1994) Runne, J. Becker, W. Laasch, D. Varding and G. Zimmerer, M. Liu and R.E. Johnson, “Exciton-induced desorption and surface-type luminescence of Kr Atoms from Kr-doped solid Ar”, Nucl.Instrum. Methods B 82, 301-309 (1993) Johnson, R.E., “Mechanisms for Desorption of Large Organic Molecules II”, Int. J. Mass Spec. and Ion Phys 26, 17-24 (1993) Sack, N.J., R.A. Baragiola, and R.E. Johnson, “Effect of Plasma Ion Bombardment on the Reflectance of Io's Trailing and Leading Hemispheres”, Icarus 104, 152-154 (1993) Johnson, R.E., “Rough Stuff at Saturn”, Nature 363, 300-301 (1993) Johnson and M.A. McGrath, “Stability of The Io Plasma Torus/Atmosphere Interaction”, Geophys. Res. Letts. 20,1735-173820 (1993) Johnson, R.E., D.A. Grosjean, and R.A. Baragiola, “Sputtering Still The Source of Plasma at Dione?”, EOS Trans. 74, 569, 572-573 (1993) Brinkamalm, G., D. Barofsky, P. Demirev, D. Fenyö, P. Håkansson, R.E. Johnson, C.T. Reimann, B.U.R. Sundqvist, “Formation of fullernes in MeV ion track plasmas”, Chem. Phys. Lett. 191, 345-350 (1992) Johnson, R. E., Boring, J., and Baragiola, R., “Theory of Sputtering”, in Handbook of Hot Atom Chemistry, ed. Matsuura et al., Kodansha, Tokyo, p. 461-469 (1992) Pospieszalska, M.K. and Johnson, R.E., “Plasma Heating of Io’s Atmosphere”, Geophys. Res. Lett. 19, 949-952 (l992) Johnson, R.E., M. Liu, R.A. Baragiola and J.W. Boring, “Energy Transfer Processes and Retention of Hot Atoms”, in Handbook of Hot Atom Chemistry, ed. T. Matsuura et al. Kodanska Ser Ltd, Tokyo, p. l56-l66 (1992) Johnson, R.E. and B.U.R. Sundqvist, “Electronic Sputtering: from Atomic Physics to Continuum Mechanics”, Physics Today, March, 28-36 (1992) Johnson, R.E., “Comment on Dayside Pick-up Oxygen Ion Precipitation at Venus and Mars”, J. Geophys. Res. 97, l3, 911-13, 914 (1992) Luhmann, J.G., R.E. Johnson, M.H.G Zhang, “Evolutionary Impact of Sputtering of the Martian Atmosphere by O+ Pick-up Ions”, Geophys. Res. Lett. l9, 2l5l-2l54 (1992) Fenyö, D. and R.E. Johnson, “Computer Experiments on Molecular Ejection from an Amorphous Solid: Comparison to an Analytic Continuum Mechanical Model”, Phys. Rev. B 46, 5090-5099 (1992) Sack, N.J., R.E. Johnson, J.W. Boring and R.A. Baragiola, “The Effect of Magnetospheric Ion Bombardment on the Reflectance of Europa's Surface”, Icarus 100, 534-539 (1992) Banerjee, S., Cui, S. T., and Johnson, R. E., “Molecular Dynamics Simulation of Sputtering in a Weakly Bound Amorphous Molecular Solid”, Phys. Rev. B. 43, 12,707-12,714 (1991) Buller, W. T., and Johnson, R. E., “Sputtering of Atoms and Excimers Upon Self- trapping of Excitons in Solid Krypton”, Phys. Rev. B. 43, 6ll8-6l20 (1991) Johnson, R. E., Pospieszalska, M.K., and Brown, W. L., “Linear to Quadratic Transition in Electronic Sputtering of Solid N2 and O2”, Phys. Rev. B. 44, 7263-7272 (1991) Pospieszalska, M. K., and Johnson, R. E., “Micrometeorite Erosion of the Main Rings as a Source of Plasma in the Inner Saturnian Plasma Torus”, Icarus 93, 4552 (1991) Strazzulla, G., Baratta, G. A., Johnson, R. E., and Donn, B., “The Primordial Comet Mantle: Irradiation Production of a Stable Organic Crust”, Icarus 91, l0l-l04 (1991) Reimann, C.T., W.L. Brown, D.E. Grosjean, M.J. Nowakowski, W.T. Buller, S.T. Cui, and R.E. Johnson, “Kinetic energy and vibrational state population distribution of Ar*2 dimers desorbed from MeV ion-excited solid argon films”, Nucl. Instrum. Methods B58, 404-4l0 (l99l). Funsten, H. O., Boring, J. W., Johnson, R.E. and Brown, W. L., “Low Temperature BeamInduced Deposition of Thin Films”, J. App. Phys. 71, 1475-1484 (1991) Johnson, R. E., Pirronello, V., Sundqvist, B.U.R., Donn, B., “Desorption of Large Molecules from Grains in Dense Clouds”, Astrophys. J. 379, L75-L77 (1991) Banerjee, S., Liu, M., and Johnson, R. E., “Molecular Dynamics Study of Low Energy Cascades in Solids: Desorption from Solid Molecular Oxygen”, Surf. Sci. 255, L504-L508 (1991) Sack, N. J., Boring, J. W., Johnson, R. E., Baragiola, R. A., and Shi, N., “Alteration of the UV-visible Reflectance Spectra of H2O Ices by Ion Bombardment”, J. Geophys. Res. 96, l7,535-l7,540 (1991) Johnson, R. E., “Irradiation Effects in a Comets Outer Layers”, J. Geophys. Res. 96, 17,553l7,558 (1991) Johnson, R.E. and R.A. Baragiola, “Lunar Surface: Sputtering and Secondary Ion Mass Spectrometry”, Geophys. Res. Letts. l8, 2l69-2l72 (l99l) Hallen, A., D. Fenyo, B.U.R. Sundqvist, R.E. Johnson, B.G. Sevensson, “The Influence of Diffusion in Films on Defect Production in MeV Proton Irradiated Silicon”, J. Appl. Phys. 3025-303070 (l99l) Johnson, R. E., Banerjee, S., Hedin, A., Fenyö, and Sundqvist, B.U.R., “Heavy-ion and Laser-Pulse Induced Ejection of Larger Organic Molecules”, in Methods and Mechanisms for Producing Ions from Large Molecules, ed. K. G. Standing, W. Ens, Plenum, N.Y. p.8999 (1991) Johnson, R.E. and B.U.R. Sundqvist, “Laser-pulse Ejection of Organic Molecules from a Matrix: Lessons from Fast-ion-induced Ejection”, Rapid Comm. in Mass Spec 5, 574-578 (l99l) Johnson, R. E., “Electronically-stimulated Sputtering (desorption)”, in Ion Formation from Organic Solids V, eds. A. Hedin, B.U.R. Sundqvist, J. Wiley, Chichester, p.189-195 (1990) Johnson, R. E., and Sittler, E. C., “Sputter-produced Plasma as a Measure of Satellite Surface Composition: Cassini Mission”, Geophys. Res. Letts. 17, 1629-1632 (1990) Fenyö, D., Sundqvist, B.U.R., Karlsson, B.K. and Johnson, R. E., “Molecular-dynamics study of electronic sputtering of large organic molecules”, Phys. Rev. B. 42, 1895-1902 (1990) Fenyö, D., Hedin, A., Hakansson, P., Johnson, R. E., and Sundqvist, B.U.R., “Radial Velocity Distributions in Electronic Sputtering of Large Organic Molecules”, Ion Formation from Organic Solids V, ed. A. Hedin, B.U.R. Sundqvist, John Wiley, Chichester, p. 33-38 (1990) Reimann, C. T., Brown, W. L., Nowakowski, M. J., Cui, S.T., and Johnson, R. E., “Ejection of Argon Dimers from Solid Ar Films Electronically Excited by MeV He Ions”, in Desorption Induced by Electronic Excitation: DIET IV, eds. G. Betz, R. Varga, Springer -Verlag, Berlin, p. 226-234 (1990) Cui, S., Johnson, R. E., and Cummings, P. T., “The Ejection of Atoms Upon Self-Trapping of an Atomic Exciton in Solid Argon”, Phys.Rev. B. 39, 9580-9583 (1989) Johnson, R. E., “Electronic Sputtering: Angular and Charge-State Dependence of the Yield via Superposition”, J. de Physique C2, 251-257 (1989) Sundqvist, B.U.R., Fenyö, D. Hedin, A. Hakansson, P., Jonsson, G., Ens, W., and Johnson, R.E., “Directional Correlations between Incident Particle and Secondary Ions”, Rad. Eff. and Def. in Solids 109, 169-174 (1989) Johnson, R. E., Pospieszalska, M. K., Sieveka, E. M., Cheng, A. F., Lanzerotti, L. J., and Sittler, E. C., “The Neutral Cloud and Heavy Ion Inner Torus at Saturn”, Icarus 77, 311-329 (1989) Pospieszalska, M. K., and Johnson, R. E., “Magnetospheric Ion Bombardment Profiles of Satellites: Europa and Dione”, Icarus 78, 1-13 (1989) McGrath, M. A., and Johnson, R. E., “Charge Exchange Cross Sections for the Io's Plasma Torus”, J. Geophys. Res. 94, 2677-2683 (1989) Johnson, R. E., “Application of Laboratory Data to the Sputtering of a Planetary Regolith”, Icarus 78, 206-210 (1989) Boring, J. W., Johnson, R. E., and O'Shaughnessy, D. J., “Surface Trapping of Excitons in Rare-Gas Solids”, Phys. Rev. B 39, 2689-2691 (1989) Boring, J. W., Johnson, R. E., Cui, S., “Electronic and Collisional Sputtering of Rare-Gas Solids”, Radiat. and Defects Solids 109, 229-233 (1989) Ingemarsson, P.A., Hedin, A., Sundqvist, B.U.R., Tombrello, T.A., and Johnson, R.E., “Electronic effects in MeV ion tracks affecting thin film adhesion”, Radiat. Eff. and Defects in Solids 108, 205-209 (1989) Cui, S.T., Cummings, P.T. and Johnson, R.E., “Classical Dynamics Description of Low Energy Cascades in Solids: Atomic Ejection from Amorphous Argon”, Surf. Sci. 222, 491498 (1989) Cui, S.T. and Johnson, R.E., “A molecular dynamics study of ejection of molecules from a vibrationally excited `track' in an amorphous solid”, Int. J. Quant. Chem. 35, 575-582 (1989) Cui, S.T., Johnson, R.E., Reimann, C.T. and Boring, J.W., “Ejection of excimers from the surface of solid argon upon exciton self-trapping”, Phys. Rev. B 39, 12,345-12,348 (1989) Johnson, R.E., “Sputtering by Fast Ions Based on a Sum of Impulses”, Phys. Rev. B 40, 49 -53 (1989) Johnson, R.E., “Plasma ion heating of an SO2 atmosphere on Io”, Geophys. Res. Letts. 16 1117-1120 (1989) Johnson, R.E., “Effect of irradiation on the surface of Pluto”, Geophys. Res. Letts. 16 1233-1236 (1989) Fenyö, D. Sundqvist, B.U.R., Karlsson, B., and Johnson, R. E., “A Molecular Dynamics Study of Electronic Sputtering of Large Organic Molecules”, J. de Physique C2, 33-`35 (1989) Reimann, C. T., Brown, W. L., and Johnson, R. E., “Electronically Stimulated Sputtering and Luminescence from Solid Argon”, Phys. Rev. B 37, 1455-1473 (1988) Johnson, R. E., “Desorption Processes in Planetary Science”, in DIET III (Springer-Verlag, Berlin, p. 47-49 (1988) Chrisey, D. B., Boring, J. W., Johnson, R. E., and Phipps, J. A., “Molecular Ejection from Low Temperature Sulfur”, Surf. Sci. 195, 594-618 (1988) Chrisey, D. B., Johnson, R. E., Boring, J. W., and Phipps, J. A., “Ejection of Sodium from Sodium Sulfide by the Sputtering of the Surface of Io”, Icarus 75, 233-244 (1988) Johnson, R. E., Nelson, M., McCord, T., and Gradie, J., “Voyager Images of Europa: Plasma Bombardment”, Icarus 75, 423-436 (1988) O'Shaughnessy, D. J., Boring, J. W., Phipps, J. A., and Johnson, R. E., “Absolute Differential Yields of Condensed Rare Gases Sputtered by keV Ions”, Surf. Sci. 203, 227244 (1988) Torrisi, L., Coffa, S., Foti, G., Johnson, R. E., Chrisey, D. B., and Boring, J. W., “Threshold Dependence in the Electronic Sputtering of Condensed Sulfur”, Phys. Rev. B 38, 15161519 (1988) O'Shaughnessy, D. J., Boring, J. W., and Johnson, R. E., “Reflection Spectra (0.37 - 0.7 um) of Ion-Bombarded Ice: Applications to Surfaces in the Outer Solar System”, Nature 333, 240-24l (1988) M. D. Walters, J. W. Boring, R. E. Johnson and W. A. Jesser, “Crystallization of SiO by He+ Bombardment”, Radiat. Effects 106, 189-201 (1988) Gibbs, K. M., Brown, W. L., and Johnson, R. E., “Electronic Sputtering of Condensed O2”, Phys. Rev. B. 38, 11001-11007 (1988) Johnson, R. E., “Desorption in Planetary Science" Desorption Induced by Electronic Transitions”, in DIET III., Springer Verlag. p. 47-48 (1988) O'Shaughnessy, D. J., Boring, J. W., Cui, S., and Johnson, R. E., “Ejected Atom Energy Spectra from Electronically Excited Rare Gas Solids”, Phys. Rev. Lett. 61, 1635-1638 (1988) Cui, S., Johnson, R. E., and Cummings, P., "Classical Dynamics Description of Low Energy Cascades in Solids: Atomic Ejection from Solid Ar”, Surf. Sci. 207, 186-206 (1988) Brown, W. L., Reimann, C. T., and Johnson, R. E., “Energy Transfer in Solid Argon During Ion Bombardment”, Nucl. Instrum. Meth. B19/20, 9 (1987) Chrisey, D. B., Johnson, R. E., Phipps, J. A., McGrath, M. A., and Boring, J. W., “Sputtering of Sulfur by keV Ions: Application to the Magnetospheric Plasma Interaction with Io”, Icarus 70, 111 (1987) Säve, A., Hakansson, P., Sundqvist, B. U. R., and Johnson, R. E., Söderström, E., Lindqvist, S. E., and Berg, J., “Crater Formation in Langmuir-Blodgett Films Induced by Electronic Sputtering With Fast, Heavy Ions”, Appl. Phys. Lett. 51, 1379 (1987) Brown, W. L., Foti, G., Lanzerotti, L. J., Bower, J. E., and Johnson, R. E., “Delayed Emission of Hydrogen from Ion Bombardment of Solid Methane”, Nucl. Instrum. and Meth. B19/20, 899 (1987) McGrath, M. A., and Johnson, R. E., “Magnetospheric Plasma Sputtering of Io's Atmosphere”, Icarus 69, 519 (1987) Johnson, R. E., Sundqvist, B., Hakansson, P., Hedin, A., Salephour, M., and Save, G., “Incident Angle Dependence of Electronic Desorption and Sputtering by Energetic Ions”, Surf. Sci. 179, 187 (1987) Cheng, A. F., Johnson, R. E., Krimigis, S. M., and Lanzerotti, L. J., “Magnetosphere, Exosphere and Surface of Mercury”, Icarus 71, 430 (1987) Lanzerotti, L. J., Brown, W. L., Maclennan, C. G., Cheng, A. F., Krimigis, S. M., and Johnson, R. E., “Effects of Charged Particles on the Surfaces of the Moons and Rings of Uranus”, J. Geophys. Res. 92, 14,949-14,956 (1987) Johnson, R. E., “Mechanisms for Desorption of Biomolecules”, Int. J. of Mass Spec. 78, 357-392 (1987) Johnson, R. E., Cooper, J. F., Lanzerotti, L. J., and Strazzulla, G., “Radiation Formation of a Non-Volatile Crust on a Comet”, Astron. Astrophys. 187, 889- 893 (1987) O'Shaughnessy, D. J., Boring, J. W., Phipps, J. A., and Johnson, R. E., “Sputtering of Rare-Gas Solids”, Nucl. Instrum. and Meth. B13, 304 (1986) Chrisey, D. B., Boring, J. W., Phipps, J. A., and Johnson, R. E., “Sputtering of Molecular Condensed-Gas Solids”, Nucl. Instrum. and Meth. B13, 360 (1986) Johnson, R. E., and Lanzerotti, L. J., “Ion Bombardment of Interplanetary Dust”, Icarus 66. 619 (1986) Brown, W. L., and Johnson, R. E., “Sputtering of Ices: A Review”, Nucl. Inst. and Meth. B13, 295 (1986) Lanzerotti, L. J., Brown, W. L., and Johnson, R. E., “Astrophysical Implications of Ice Sputtering”, Nucl. Instrum. and Meth. B14, 373 (1986) Sundqvist, B., Hedin, A., Hakansson, P., Sahelpour, M.,Save, G., Widdiyaseker S., and Johnson, R. E., “Solid Sample-SIMS on Biomolecules with Fast Ion Beams from the Uppsala EN-Tandem Accelerator”, in Secondary Ion Mass Spectrometry: SIMSV, Springer, Berlin, p.484 (1986) Brown, W. L., Lanzerotti, L. J., Marcantonio, K. J., Johnson, R. E., and Reimann, C. T., “Sputtering of Ices by High Energy Particle Impact”, Nucl. Instrum. Meth. B14, 392 (1986) McGrath, M. A., Johnson, R. E., and Lanzerotti, L. J., “Sputtering of Na on the Planet Mercury”, Nature 323, 694 (1986) Sieveka, E. M., and Johnson, R. E., “Nonistropic Coronal Atmosphere on Io”, J. Geophys. Res. 90, 5327 (1985) Hedin, A., Hakansson, P., Sundqvist, B., and Johnson, R. E., “Ion Track Model for Fast-Ion-Desorption of Molecules”, Phys. Rev. B. 31, 1780 (1985) Johnson, R. E., “Polar Frosts on Ganymede”, Icarus 62, 344 (1985) Rook, F. L., Johnson, R. E., and Brown, W. L., “Electronic Sputtering of Solid N2 and O2: A Comparison of Non-Radiative Relaxation Processes”, Surface Science 164, 25 (1985) Johnson, R. E., “Comment on the Evolution of Interplanetary Grains”, in Ices in the Solar System, J. Klinger, ed., D. Reidel, p. 337 (1985) Johnson, R. E., Barton, L. A., Boring, J. W., Jesser, W. A., Brown, W. L., and Lanzerotti, L. J., “Charged Particle Modification of Ices in the Saturnian and Jovian Systems”, in Ices in the Solar System, J. Klinger, ed., D. Reidel, p.301 (1985) Lanzerotti, L. J., Brown, W. L., and Johnson, R. E., “Sputter Erosion of H2O, SO2, and CH4”, in Ices in the Solar System, J. Klinger, ed., D. Reidel, p.317 (1985) Brown, W. L., Reimann, C. T., and Johnson, R. E., “Electronically Induced Desorption and Luminescence from Multilayer Argon”, in “Desorption Induced by Electronic Transitions. DIET II”, Surf. Sci. Series 4, Springer-Verlag, eds.W. Brenig and D. Menzel, p.199 (1985) Boring, J. W., Nansheng, Z., Chrisey, D. B., O'Shaughnessy, D. J., Phipps, J. A., and Johnson, R. E., “The Production and Sputtering of S2 by keV Ion Bombardment”, in Asteroids, Comets, and Meteors II, eds. H. Rickman et al., Univ. Uppsala Press, p.229 (1985) Johnson, R. E., Garrett, J. W., Boring, J. W., Barton, L. A., and Brown, W. L., “Ion Erosion of Condensed SO2 on Io”, J. Geophys. Res., 89 Suppl. B711 (1984) Brown, W. L., Augustyniak, W. M., Marcantonio, K. J., Simmons, E. N., Boring, J. W., Johnson, R. E., and Reimann, C. T., “Electronic Sputtering of Low-Temperature Molecular Solids”, Nucl. Instrum. and& Meth. B1, 307 (1984) Boring, J. W., Garrett, J. W., Cummings, T. A., & Johnson, R. E., “Sputtering of Solid SO2”, Nucl. Instrum. and Meth. B1, 321 (1984) Reimann, C. T., Boring, J. W., Johnson, R. E., Garrett, J. W., Farmer, K. R., and Brown, W. L., “Ion-Induced Molecular Ejection from D2O Ice”, Surface Science 147, 227 (1984) Sieveka, E., and Johnson, R. E., “Ejection of Atoms and Molecules from Io by Plasma Ion Impact”, Astrophys. J. 287, 418 (1984) Johnson, R. E., Lanzerotti, L. J., and Brown, W. L., “Sputtering Processes: Erosion and Chemical Change”, Adv. in Space Res. 4, 41 (1984) Lanzerotti, L. J., Brown, W. L., Marcantonio, K. J., and Johnson, R. E., “Production of Ammonia-Depleted Surface Layers on the Saturnian Satellites by Ion Sputtering”, Nature 139, 5990 (1984) Reimann, C. T., Johnson, R. E., and Brown, W. L., “Sputtering and Luminescence in Electronically Excited Solid Argon”, Phys. Rev. Lett. 53, 600 (1984) Garrison, B. J., and Johnson, R. E., “Ejection of Atoms from Rare-Gas Solids by Low Energy Cascades”, Surface Science 148, 388 (1984) Brown, R. A., Shemansky, D. E., and Johnson, R. E., “A Deficiency of OIII in the Io Plasma Torus”, Astrophys. J. 264, 304 (1983) Brown, W. L., Augustyniak, W. M., Lanzerotti, L. J., Marcantonio, K. J., and Johnson, R. E., “The Non-Linear Erosion Yield of Condensed Gas Solids Electronically Excited by Fast Light Ions”, in DIET-I, Chem. Phys. Ser. 24 (1983) Johnson, R. E., and Inokuti, M., “Electronic Relaxation in Rare-Gas Solids: Ejection of Atoms by Fast Charged Particles”, Nucl. Inst. and Meth. 206, 289 (1983) Johnson, R. E., and Brown, W. L., “Sputtering of Insulators Due to Electronic Excitation by Fast Ions and Electrons”, Nucl. Inst. and Meth. 209/210, 469 (1983) Johnson, R. E., Brown, W. L., and Lanzerotti, L. J., “Energetic Charged Particle Erosion of Ices in the Solar System”, Chem. Phys. 193, 31 (1983) Johnson, R. E., Boring, J. W., Reimann, C. T., Barton, L. A., Sieveka, E. M., Garrett, J. W., Farmer, K. R., Brown, W. L., and Lanzerotti, L. J., “Plasma-Ion Induced Molecular Ejection on the Galilean Satellites: Ejected Molecule Energies”, Geophys. Res. Lett. 10, 892 (1983) Johnson, R. E., and Sundqvist, B., “A Mechanism for Ejection of Large Biological Molecules by Incident Ions”, Int. J. of Mass. Spec. 53, 337 (1983) Lanzerotti, L. J., Maclennan, C. G., Brown, W. L., Johnson, R. E., Barton, L. A., Reimann, C. T., Garrett, J. W., and Boring, J. W., “Discussion of Energetic Ion Erosion of the Icy Satellites of Saturn Using Voyager Data”, J. Geophys.Res. 88, 8765 (1983) Boring, J. W., Johnson, R. E., Reimann, C. T., Garrett, J. W., Brown, W. L., and Marcantanio, K., “Ion Induced Chemistry in Condensed Gas Solids”, Nucl. Instrum. and Meth. 218, 707 (1983) Johnson, R. E., Lanzerotti, L. J., and Brown, W. L., “Planetary Applications of Condensed Gas Sputtering”, Nuclear Instrum. Methods 198, 147 (1982) Johnson, R. E., and Brown, W. L, “Sputtering Mechanisms in Condensed Gases”, Nuclear Instrum. Methods 198, 103 (1982) Brown, W. L., Augustyniak, W. M., Simmons, E., Marcantonio, K. J., Lanzerotti, L. J., Johnson, R. E., Boring, J. W., Reimann, C. T., Foti, G., and Pirronello, V., “Erosion and Molecular Formation in Condensed Gas Films by Electronic Energy Loss of Fast Ions”, Nucl.Instrum. Methods 198, 1 (1982) Lanzerotti, L. J., Brown, W. L., Augustyniak, W. M., and Johnson, R. E., “Sputtering of SO2 Frosts and the Applications to Atmospheres on Io”, Astrophysical Journal, 259, 920 (1982) Sieveka, E., and Johnson, R. E., “Sputtered Particle Erosion and Redistribution Europa, Ganymede and Callisto”, Icarus 51, 528 (1982) Brown, W. L., Lanzerotti, L. J., and Johnson, R. E., “Fast Ion Bombardment of Ices: Astrophysical Implications”, Science 218, 525 (1982) McAfee, K. B., Szmanda, C. R., Hozack, R. S., and Johnson, R. E., “Dynamics of Energy Transfer During Charge-Exchange in Symmetric Diatomic Systems”, J. Chem. Phys. 77, 2399 (1982) Johnson, R. E., and Strobel, D. F., “Charge Exchange in the Io Torus and Exosphere”, J. Geophys. Res. 87, 385 (1982) Johnson, R. E., Lanzerotti, L. J., and Brown, W. L., “Charge Particle Erosion of Ice Grains and Comets”, Astron. Astrophys. 123, 343 (1982) Johnson, R. E., Lanzerotti, L. J., and Brown, W. L., “Erosion Galilean Satellite Surfaces by Jovian Magnetosphere Particles”, Science 212, 1027 (1981) Lanzerotti, L. J., Brown, W. L., and Johnson, R. E., “Ice in the Polar Regions of the Moon”, J. Geophys. Res. 86, 3949 (1981) Brown, W. L., Augustyniak, W. M., Brody, E., Cooper, B., Lanzerotti, J. L., Ramirez, A., Evatt, R., and Johnson, R. E., “Energy Dependence of the Erosion of H2O Ice Films by H and He Ions”, Nucl. Inst. and Methods 170, 321 (1980) McAfee, K. B., Hozack, R. S., and Johnson, R. E., “S Oscillations and Spin Change During Charge Exchange in Ar+ + Ar”, Phy. Rev. Letts. 44, 1247 (1980) Johnson, R. E., and Evatt, R., “Thermal Spikes and Sputtering Yields”, Radiat. Effects 52, 187 (1980) Brown, W. L., Augustyniak, W. M., Lanzerotti, L. J., Johnson, R. E., and Evatt, R., “Linear and Non-Linear Processes in the Erosion of Ice by Fast Light Ions”, Phys. Rev. Letts 45, 1632 (1980) Rogers, W. T., Boring, J. W., and Johnson, R. E., “Scattering of He+2 from N2; Comparison of He+2 + N2 with He+2 + Ne and Ar”, J. of Physics B 11, 2319 (1978) Johnson, R. E., “Comment on Ion and Electron Temperatures in the Martian Upper Atmosphere”, JGR Lett. 5, 989 (1978) Johnson, R. E., and Gooray, A. M., “Binary-Encounter Stopping Cross Sections III Straggling and Screening”, Physical Rev. A 16, 1432 (1977) Sigmund, P., and Johnson, R. E., “Comment on the Biological Effect of Elastic Nuclear Collisions”, Radiation Res. 71, 481-492 (1977) Johnson, R. E., and Trevisani, E. T., “Damage and Energy Deposition in RNase by Low-Energy Ions”, Rad. Res. 68, 1-22 (1976) Johnson, R. E., “Quasi-Elastic Damage and Energy Degradation: Approximate Analytic Model”, Phys. Med. Biol. 21, 434 (1976) Chen, Y., Johnson, R. E., Humphris, R., Siegel, M., Boring, J., “Differential Scattering of He++ from He”, J. Phys.B 8, 1527-1543 (1975) Harberger, J. H., Johnson, R. E., and Boring, J. W., “Comparison of Binary Encounter and Born Approximations for Incident Neutral Systems”, J. Phys. B 6, 1040 (1974) Harberger, J. H., Johnson, R. E., and Boring, J. W., “Stopping Power Calculations in the Binary Encounter Approximation: Shell Structure”, Phys. Rev. A 9, 1172 (1974) Harberger, J. H., Johnson, R. E., and Boring, J. W., “Stopping Power Calculations in the Binary Encounter Approximation: Helium on Hydrogen”, Phys. Rev. A 9, 1161 (1974) Johnson, R. E., Trevisani, E., and Harberger, J. H., “Charge Transfer in Bio-Molecular Damage by Low-Energy Protons”, Phys. Med. Biol. 18, 287 (1973) Johnson, R. E., “Charge Transfer and Fine-Structure Transition in Kr+ + Kr and Xe+ + Xe”, J. Phys. Soc. Japan, 32 (1972) Johnson, R. E., Carlston, C. E., and Boring, J. W., “Energy Dependence in the Total Differential Cross Sections for H+ + Kr and H+ + Ar”, Chem. Phys. Lett. 16, 119-122 (1972) Johnson, R. E., “Charge Transfer and Spin Change in Ar+ +-Ar Collisions”, J. Phys. B. 3, 539-50 (1970) Johnson, R. E., Comment on “Oscillations in the Cross Section Ar+ + -Ar Charge Transfer”, Physics Letters A 33, 452 (1970) Johnson, R. E., and Epstein, S. T., “The Dipole Shielding Tensor”, J. Chem.Phys., 51, 188 (1969) Johnson, R. E., and Epstein, S. T., “Connections Between Several Perturbation Theories of Intermolecular Forces”, Chem. Phys. Letters 1, 599 (1968) Johnson, R. E., and Epstein, S. T., “The Application of Perturbation Theories for Exchange Forces to a Simple Model”, Chem. Phys. Letters 1, 602 (1968) Johnson, R. E., Epstein, S. T., and Meath, W. J., “Evaluation of Long-Range Retarded Interaction Energies”, J. Chem. Phys. 47, 1271 (1967) Johnson, R. E., and Certain, P. R., Comment on “van der Avoird's Wave Operator Formalism”, Chem. Phys. Letters 1, 413 (1967) Johnson, R. E., and Epstein, S. T., “Improvement of Uncoupled Hartree-Fock Expectation Values for Physical Properties”, J. Chem. Phys. 47, 1276 (1967) Green, T. A., and Johnson, R. E., “Classical Heavy-Particle Trajectories for Electron Capture in H++He Collisions and for Other Asymmetric Collisions”, Phys. Rev. 152, 9 (1966)