Publications
2013
Phys. Rev. E 87, 052602 (2013).
P. Ramya, P. Guagliardo, T. Pasang, C. Ranganathaiah, S. Samarin, and J. F. Williams, Influence of polar
groups in binary polymer blends on positronium formation.
Appl. Phys. Lett. 102, 121907 (2013)
Nikita Kostylev, Ivan S. Maksymov, Adekunle O. Adeyeye, Sergey Samarin, Mikhail Kostylev, and Jim F.
Williams, Plasmon-assisted high reflectivity and strong magneto-optical Kerr effect in permalloy gratings.
Phys. Rev. B 87, 064424 (2013)
K. L. Livesey, J. Ding, N. R. Anderson, R. E. Camley, A. O. Adeyeye, M. P. Kostylev, and S. Samarin,
Resonant frequencies of a binary magnetic nanowire.
Phys. Rev. A 87 (1), 016703 (2013)
J.F. Williams, L. Pravica, S. Samarin, Reply to``Comment I and Comment II on Topological angular
momentum in electron exchange excitation of a single atom'''.
Phys. Rev. B 87, 085418 (2013)
K. Sudarshan, S.N. Samarin, P. Guagliardo, V.N. Petrov, A. H. Weiss and J.F. Williams, Angle resolved
energy distribution of re-emitted positrons from W(100) single crystal.
2012
Phys. Rev. B 86, 184431 (2012)
M. Kostylev, A.A. Stashkevich, Y. Roussigné, N.A. Grigoryeva, A.A. Mistonov, D. Menzel, N.A.
Sapoletova, K.S. Napolskii, A.A. Eliseev, A.V. Lukashin, S.V. Grigoriev, and S. N. Samarin, Microwave
Properties of Ni-based Ferromagnetic Inverse Opals.
Phys. Rev. B 85, 104414 (2012)
R. Bali, M. Kostylev, D. Tripathy, A. O. Adeyeye, and S. Samarin, High-symmetry magnonic modes in
antidot lattices magnetized perpendicular to the lattice plane.
Phys. Rev. A 85 (2012) 022701
Topological angular momentum in electron exchange excitation of a single atom.
J. F. Williams, L. Pravica, and S. N. Samarin
Acta Materialia 60 (2012) 4218
'Study of vacancy-type defects by positron annihilation in ultrafine-grained aluminum severely
deformed at room and cryogenic temperatures',.
Su, L.H., Lu, C., He, L.Z., Zhang, L., Guagliardo, P.R., Tieu, A.K., Samarin, S., Williams, J.F., Li,
H.J.
Journal of the American Ceramic Society 95 (2012) 1727
'Positron annihilation lifetime studies of Nb-doped TiO 2, SnO 2, and Zr O 2',.
Guagliardo, P.R., Vance, E.R., Zhang, Z., Davis, J., Williams, J.F., Samarin, S.
2011
EPL, 96, 57007 (2011)
C.S. Chang, M. Kostylev, A. O. Adeyeye, M. Bailleul and S. Samarin, Coplanar probe microwave
current injection ferromagnetic resonance of magnetic nanostructures.
Phys. Rev. A 83 (2011) 040701
Unexpected effects in spin-polarized electron-impact excitation of the (3d104s5s)3S1 state in
zinc
L. Pravica, J. F. Williams, D. Cvejanovic, S. Samarin, K. Bartschat, O. Zatsarinny, A. D. Stauffer,
and R. Srivastava
Phys. Rev. B 84 (2011) 184433.
Influence of Ni buffer layer on spin-related electronic properties of Co film on W(110) studied by spinpolarized single- and two-electron spectroscopy.
S. Samarin, O. M. Artamonov, V. N. Petrov, M. Kostylev, L. Pravica, A. Baraban and J. F. Williams
J Phys Conf Ser, 288 (2011) 1-8.
'Spin-orbit effects in the (e,2e) scattering from a W(110) surface and thin gold layer'
Samarin, S., Artamonov, O.M., Sergeant, A.D., Pravica, L., Cvejanovic, D., Wilkie, P.J.,
Guagliardo, P.R., Suvorova, A., Williams, J.F.
2010
Phys Rev A 81 (2010) 032701
Negative-ion resonances and cusps in 41,3 P electron excitation functions of the zinc atom
S. A. Napier, D. Cvejanovic, J. F. Williams, and L. Pravica
J Phys B At Mol Opt Phys 43 (2010) 215208
Investigation of the behaviour of the Sherman function for elastic electron scattering from Kr and Xe
RP McEachran, AD Stauffer, M Piwinski L Pravica, JF Williams, D Cvejanovic, SN Samarin,
Surface Science, 604 (2010) 1833
Spin asymmetry in elastic scattering of low-energy electrons from ultrathin Au films on W(110).
S. N. Samarin, J. F. Williams, O. M. Artamonov, J. Henk, and R. Feder
Phys Rev Lett 104 (2010) 247403
Auger mediated quantum sticking of positrons to surfaces – Evidence for single step transition from
a scattering state to a surface image potential bound state
S. Mukherjee, Manori P. Nadesalingam, P Guagliardo, A.D. Sergeant , J.F. Williams, Nail Fazleev,
A.H. Weiss
2009
Phys. Rev. A 80 (2009) 042710
Negative-ion resonances in zinc: A study in elastic electron scattering and electron transmission
S. A. Napier, D. Cvejanovic, P. D. Burrow, J. F. Williams, J. A. Michejda, and L. Pravica
Phys. Rev. A 79 (2009) 042702
Emission cross sections for electron-impact excitation of zinc atoms
S. A. Napier, D. Cvejanovic, J. F. Williams, L. Pravica, D. Fursa, I. Bray, O. Zatsarinny, and K.
Bartschat
Tech Phys 54 (2009) 1034 Original Zhurnal Tekhnichesko³ Fiziki, 79 (2009) 108
Binary and Multiparticle Electron–Electron Interaction on the Surface
O. M. Artamonov, S. N. Samarin and J. F. Williams
Rev Sci Instrum 80 (2009) 103705
Spatially resolved scanning probe electron energy spectroscopy for Ag islands on a graphite surface
ChunKai Xu, XiangJun Chen, Xia Zhou, Zheng Wei, WenJie Liu, JiWei Li, J. F. Williams and
KeZun Xu
2008
Rev Sci Instrum 79 (2008) 023104.
Miniature electrostatic electron energy analysers and S-shaped deflector.
JF Williams, Xuangjun Chen and P Wilkie
Phys Rev A, 78 (2008) 032706.
The effect of electron correlations on the excitation of zinc in the autoionizing region – A photon
emission study.
S. Napier D Cvejanovic, J F Williams and L Pravica
Phys RevA, 78 (2008) 022702.
Temporary negative-ion effects on photon emission from free zinc atoms excited by electron impact
S. Napier D Cvejanovic, J F Williams and L Pravica
J Electron Spect Rel Phenom, 165 (2008) 15
Angle and energy dispersive multichannel electron energy spectrometer for surface analysis.
Xia Zhou, ChunKai Xu, Zheng Wei, WenJie Liu, JiWei Li, XiangJun Chen, J.F. Williams*, KeZun
Xu
2007
J Phys B At Mol Opt Phys (2007) 40 1323-1329
Negative ion resonances in the autoionizing region of zinc: excitation of the 4s4p3P 0,1,2 states.
S A Napier, D Cvejanovic, J F Williams and L Pravica
Phys Rev A75 (2007) 12721
Open and closed shell, electron exchange effects in zinc atoms.
S A Napier, D Cvejanovic, JF Williams and L Pravica.
Phys Rev A 75 (2007) 030701
Angular-momentum-dependent Fano profiles in excited zinc atoms.
L. Pravica, D. Cvejanovic, J. F. Williams and S. A. Napier
Surface Science (2007) 601 5783-7.
Magnetic anisotropy and electronic structure of iron films on W(110) by spin-polarized two-electron
spectroscopy.
A.D. Sergeant, S. Samarin, and J.F. Williams
Surface Science (2007) 601 4343-7
Electronic structure of thin cobalt film on W(110) by spin-polarised two-electron spectroscopy.
SN Samarin, OM Artamonov, AD Sergeant and JF Williams
J Electron Spectros Rel Phenom (2007) 161 147
Application of two-electron spectroscopy in reflection for studying electronic structure of surfaces
and thin films.
S. Samarin, O.M. Artamonov, A.D. Sergeant, A.A. Suvorova, J.F. Williams
Rev Sci Instrum 78 (2007) 1
Perspective: An improved double toroid spectrometer for gas phase (e,2e) studies.
J. F. Williams
Phys. Rev. B 76 (2007) 125402
Spin-dependent reflection of very-low-energy electrons from W(110).
S. N. Samarin, J. F. Williams, A. D. Sergeant, O. M. Artamonov, H. Gollisch and R. Feder
2006
J Phys B At Mol Opt Phys 39 719-728 (2006).
Differential cross sections for excitation to the 3s, 3p and 3d states of atomic hydrogen by electron
impact at energies from 16.5 to 54 eV.
J F Williams, Philip L Bartlett, Igor Bray, Andris T Stelbovics and A G Mikosza
Phys Rev Lett 96 (2006) 123201
Threshold Electron-Impact Ionisation Mechanism for Atomic Hydrogen.
JF Williams, P Bartlett, AT Stelbovics
Phys Rev Lett 97 (9) (2006) 096402
Energy- and momentum-resolved exchange and spin-orbit interaction in cobalt film by spinpolarized two-electron spectroscopy.
S. Samarin, O.M. Artamonov, A.D. Sergeant, R. Stamps, J.F. Williams
J. Phys. B: At. Mol. Opt. Phys. 39 (2006) 4113-4122
Atomic hydrogen revisited: electron impact excitation to H(2p) at 54 eV
J F Williams and A G Mikosza
J. Phys. B: At. Mol. Opt. Phys. 39 (2006) 4339-4340.
Electron–photon angular correlations from the electron impact excitation of the 2s and 2p electronic
configurations of atomic hydrogen.
JF Williams, AG Mikosza
Rev Sci Instrum, 77 (2006) 076104
Compact bakable in-line valve for ultrahigh vacuum
L Pravica, D Cvejanovic, J F Williams, S A Napier, S N Samarin, A D Sergeant
Phys Rev A 74 022714 (2006)
Differential and integrated cross sections for excitation to the 3s, 3p and 3d states of atomic
hydrogen by electron impact below the n=4 threshold.
Philip L Bartlett, J F Williams, Igor Bray, A G Mikosza and Andris T Stelbovics
2005
Review of Scientific Instruments, 76, (2005) 6, pp. 063303-1 - 063303-12.
'Multidetection (e,2e) electron spectrometer',
van Boeyen, R.W., Williams, J.F.
Physical Review A, 71, 5, pp. 052709-1-052709-8
Krypton fine structure in perpendicular-plane electron-impact ionization'
Williams, J.F., van Boeyen, R.W., Samarin, S. 2005
Surface Science, 579, (2005) 166-174
'Secondary emission from W(110) excited by spin-polarized electrons',
Samarin, S., Artamonov, O.M., Sergeant, A., Williams, J.F.
Physical Review B, 72 (2005) 23, pp. 235419-1-235419-5.
Anisotropy of spin-orbit interaction in W(110) by spin-polarized two-electron spectroscopy',
Samarin, S., Artamonov, O.M., Sergeant, A., Williams, J.F.
2004
Correlation Spectroscopy of Surfaces, Thin Films, and Nanostructures, Edited by Jamal Berakdar,
Jürgen Kirschner, 2004 Wiley-VCH Verlag, pp. 57-72, ISBN: 3-527-40477-5
Two-Electron Spectroscopy Versus Single-Electron Spectroscopy for Studying Secondary Emission
from Surfaces,
S Samarin, OM Artamonov, AD Sergeant, and JF Williams.
Phys Rev Lett 93 (2004) 073201.
Electron exchange in dissociative excitation of molecular hydrogen using polarised electrons. DH
Yu and JF Williams
Surface Science 548 (2004) 187-199.
Secondary-electron emission mechanism of a LiF film by (e,2e) spectroscopy.
S Samarin, J Berakdar, A Suvorova, OM Artamonov, DK Waterhouse, J Kirschner, JF Williams
Solid State Communications 129 (2004) 389-393.
Measurements of insulator band parameters using combination of single-electron and two-electron
spectroscopy.
S Samarin, O Artamonov, AA Suvorova, A Sergeant and JF Williams
Phys. Rev. B70 (2004) 073403. Spin-orbit coupling in tungsten by spin-polarized (e,2e) s
pectroscopy. S Samarin, O Artamonov, A Sergeant, J Kirschner, A Morozov and JF Williams
Refereed conference papers only when the paper was published in full in the proceedings
J. Phys.: Conf. Ser. 262 (2011) 012022
Clay particles - potential of positron annihilation lifetime spectroscopy (PALS) for studying
interlayer spacing
N Fong, P Guagliardo, J Williams, A Musumeci, D Martin and SV Smith
J. Phys.: Conf. Ser. 262 (2011) 012023
Characterisation of metakaolin-based geopolymers using beam-based and conventional PALS.
P Guagliardo, J Roberts, E R Vance, R Weed, A D Sergeant, A Howie, P Wilkie, M Went, J
Sullivan, J Williams, S Samarin and S Buckman
J. Phys.: Conf. Ser. 262 (2011) 012048
A study of porosity of synthetic polymer nanoparticles using PALS.
Pham B, Guagliardo P, Williams J F, Samarin S and Smith S V
J Phys.: Confer. Ser.,288 (2011) 012015.
Spin-orbit effects in the (e,2e) scattering from a W(110) surface and thin gold layer,
Samarin S, Artamonov O M, Sergeant A, Pravica L, Cvejanovic D, Wilkie P, Guagliardo P, Suvorova A A
and Williams J F
J Phys: Conf Ser 212 (2010) 012012 International Symposium on (e,2e) and the 15th ISPCEAC
Electron correlations and spin effects activated by excitation of an inner 3d electron in zinc
D Cvejanovic, S A Napier, J F Williams and L Pravica
J Phys Conf Ser 235 (2010) 012005
Spin-polarised parameters of open and closed shell transitions and their resonances in zinc atoms
Williams J F, Pravica L, Cvejanovic D, Napier S A, Samarin S N and Piwinski M.
J. Phys.: Conf. Ser. 185 (2009) 012032
Spin dependence in resonance electron scattering from zinc atoms
S A Napier, D Cvejanovic, J F Williams, L Pravica, S N Samarin, A D Sergeant, P Guagliardo and
P Wilkie
J. Phys.: Conf. Ser. 185 (2009) 012005
Post collision interaction effects in the excitation of zinc atoms
D Cvejanovic, S A Napier, J F Williams, L Pravica, S N Samarin, A D Sergeant, P Guagliardo and
P Wilkie
J. Phys.: Conf. Ser. 185 (2009) 012041
On the mechanism of spin-dependent (e,2e) scattering from a ferromagnetic surface
S N Samarin, O M Artamonov, A D Sergeant, L Pravica, D Cvejanovic, P Wilkie, P Guagliardo, A
A Suvorova and J F Williams
J. Phys.: Conf. Ser. 194 (2009) 042019
Scattering asymmetries in excitation of zinc by spin polarized electrons
D Cvejanovic, S Napier, J W Williams and L Pravica
J Phys Conf Ser 100 (2008) 072033
Low-energy spin-polarized two-electron spectroscopy: a powerful tool for studying exchange
correlation and spin-orbit interaction on surfaces
S Samarin, O M Artamonov, A D Sergeant, J Kirschner and J F Williams
J. Phys Conf Ser 80 (2007) 012023.
Angular momentum effects in electron scattering from atoms.
J.F. Williams, D. Cvejanovic, S.N. Samarin, L. Pravica, S. Napier and A.D. Sergeant
J Phys Conf Ser 80 (2007) 012024
Emission of correlated electron pairs from clean and oxygen covered W(110) upon spin-polarized
electron impact
J.F. Williams, S.N. Samarin, O.M. Artamonov, A.D. Sergeant, L. Pravica, D. Cvejanovic and P.
Wilkie.
J Phys Conf Ser 88 (2007) 012067.
Spin-resolved negative on resonances in zinc near 11 eV.
L. Pravica, D. Cvejanovic, J. F. Williams and S. A. Napier