Habilitation work for Dr.habil.phys. scientific degree
Mārtiņš Balodis
The study of odd-odd rare-earth nuclei in the transitional region
Latvian Academy of Sciences, Nuclear Research Center and University of Latvia, Solid
State Physics Institute. Riga, 1999
ABSTRACT
The thesis summarize the results of the study of odd-odd rare-earth nuclei belonging
to the transitional deformation region. Both the construction of model-independent level
schemes and the interpretation of nuclear structure using nuclear models are considered.
The level schemes of odd-odd nuclei are interpreted in the framework of geometrical
approach employing the rotor-plus-two quasiparticles model. Especial attention is given
to the effects specific for transitional nuclei, i.e. vibrational bands, octupole deformation
and the large mixing of rotational bands with ∆K = 0, due to the high level density. The
systematics of general characteristics of developed level schemes throughout
deformation region with 150 < A < 195 is analysed as well.
AUTHOR'S OWN PUBLICATIONS
Al T.von Egidy, W.Kaiser, W.Mampe, C.Hillenbrand, W.Stoffl, R.G.Lanier, K.Muhlbauer, O.W.Schult, H.R.Koch, H.A.Baader, R.L.Mlekodaj, R.K.Sheline,
E.B.Shera, J.Ungrin, P.T.Prokofjev, L.I.Simonova, M.K.Balodis, H.Seyfarth,
B.Kardon, W.Delang, P.Gottel, D.Breitig. W.R.Kane, R.F.Casten, H.J.Scheerer.
P.GlassI, E.Huenges, M.Loffler, H.Rosier and H.K.Vonach. Nuclear levels in
152
Eu. Z.Phys. A286 (1978) 341-380.
A2 M.K.Balodis, P.T.Prokofjev, N.D.Kramer, L.I.Simonova, K.Schreckenbach,
W.F.Davidson, J.A.Pinston, P.Hungerford, H.H.Schmidt, H.J.Scheerer, T.von
Egidy, P.H.M. Van Assche, A.M.J.Spits. R.J.Casten, W.R.Kane, D.D.Warner and
J.Kern. Levels in 154Eu populated by (n, ) and (d,p) reactions. Nucl.Phys. A472
(1987) 445-521.
A3 M.K.Balodis, N.D.Kramer, P.T.Prokofjev, A.V.Afanasjev, T.V.Guseva,
J.J.Tambergs, K.Schreckenbach, W.F.Davidson, D.D.Warner, J.A.Pinston,
P.H.M.Van Assche and A.M.J.Spits. Level structure of the odd-odd nucleus 156Eu.
Nucl.Phys. A523 (1991) 261-299.
A4 J.Kern, A.Raemy. W.Beer, J.-Cl.Dousse, W.Schwitz, M.K.Balodis, P.T.Prokofjev,
N.D.Kramer, L.I.Simonova, R.W.HofF, D.G.Gardner, M.A.Gardner. R.F.Casten,
R.L.Gill, R.Eder, T.von Egidy, E.Hagn, P.Hungerford, H.J.Scheerer, H.H.Schmidt,
E.Zech, A.Chalupka, A.V.Murzin, V.A.Libman, I.V.Kononenko, C.Coceva,
P.Giacobbe, I.A.Kondurov, Yu.E.Loginov, P.A.Sushkov, S.Brant and V.Paar.
Nuclear levels in 192Ir. Nucl.Phys. A534 (1991) 77-127.
A5 M.Balodis, P.Prokofjevs, N.Kramere, L.Simonova, J.Berzins, T.Krasta, J.Kern,
A.Raemy, J.C.Dousse, W.Schwitz, J.A.Cizewski, G.G.Colvin, H.G.Borner,
P.Geltenbort, F.Hoyler, S.A.Kerr, K.Schreckenbach, R.Georgii, T.von Egidy,
J.Klora, H.Lindner, U.Mayerhofer, A.Walter, A.V.Murzin, V.A.Libman,
I.A.Kondurov, Yu.E.Loginov, P.A.Sushkov, S.A.Brant, V.Paar and V.Lopac.
Level scheme of 194Ir. Nucl.Phys.A A641 (1998), 133-187.
A6 M.Balodis, P.Prokofjev, N.Kramere, L.Simonova, J.Berzins, T.Krasta, R.Georgii,
T.von Egidy, J.Klora, H.Lindner, U.Mayerhofer, A.Walter, J.A.Cizewski,
G.G.Colvin, H.G.Borner, P.Geltenbort, F.Hoyler, S.A.Kerr, K.Schreckenbach,
A.Raemy, J.C.Dousse, J.Kern, W.Schwitz, I.A.Kondurov, Yu.E.Loginov, P.Sushkov, S.Brant, V.Paar and V.Lopac. Study of 194Ir via thermal capture and (d,p)
reactions. Fizika (Zagreb) B7 (1998) 1, 15-36.
A7 H.Rotter, C.Heiser, K.D.Schilling, W.Andrejtscheff, L.K.Kostov and M.K.Balodis.
Electromagnetic transition probabilities in the doubly odd N = 91 nucleus 154Eu.
Nucl.Phys. A417 (1984) 1-23.
A8 M.Balodis. The revised Nilsson model interpretation of transitional nucleus 192Ir.
In: Proc. 9th Int.Symp. on Capture Gamma-Ray Spectroscopy and Related
Topics, Budapest, 1996. Vol.1. Eds. G.L.Molnar, T.Belgya, Zs.Revay (Springer
Hungarica Ltd, Budapest, 1997) pp.147-153.
A9
A.V.Afanasjev, T.V.Guseva, J.J.Tambergs and M.K.Balodis. Octupole
deformation of the nuclei of Eu isotopes. Izvestiya AN SSSR, ser.fiz. 54 (1990)
1838-1844 (in Russian).
A10 A.V.Afanasjev, T.V.Guseva, J.J.Tambergs and M.K.Balodis. Octupole deformation
in odd-odd nuclei 154'156Eu. In: Capture Gamma-Ray Spectroscopy, Pacific Grove,
CA, 1990. AIPConf.Proc.238. Ed. R.W.Hoff(AIP. New York, 1991) pp.253-256.
All M.K.Balodis, P.T.Prokofjev and A.V.Afanasjev. Experimental evidence for
octupole deformation from observation of parity doublets in 152Eu, 154Eu, 156Eu
neutron capture studies. In: Capture Gamma-Ray Spectroscopy, Pacific Grove.
CA, 1990. AIP Conf.Proc.238. Ed. R.W.Hoff (AIP, New York, 1991) pp.446454.
A12 T.V.Guseva, A.V.Afanasjev, J.J.Tambergs and M.K.Balodis. Residual
interaction of unpaired nucleons in 154Eu. Izvestiya AN SSSR, ser.fiz. 51 (1967)
856-862 (in Russian).
A13 J.Kern, G.Mauron, B.Michaud, K.Schreckenbach, T.von Egidy, W.Mampe,
H.R.Koch, H.A.Baader, D.Breitig, U.Gruber, B.P.K.Maier, O.W.B.Schult,
J.T.Larsen, R.G.Lanier, J.J.Tambergs and M.K.Balodis. Nuclear levels in 160Tb.
Nucl.Phys. A221 (1974) 333-370.
Al4 M.Balodis, J.Berzins, V.Bondarenko, P-Prokofjevs and A.V.Afanasjev. Vibrational and two-particle levels in the strongly deformed 166Ho. In: Proc. 8th
Int.Symp. Capture Gamma-Ray Spectroscopy and Related Topics, Fri-bourg,
1993. Ed. J.Kern (World Scientific, Singapore, 1994) pp.268-273.
A15 R.W.Hoff, H.G.Borner, K.Schreckenbach, G.G.Colvin, F.Hoyler, W.Schauer,
T.von Edigy, R.Georgii, J.Ott. S.Schrunder. R.F.Casten, R.L.Gill, M.Balodis,
P.Prokofjevs, L.Simonova, J.Kern, V.A.Khitrov, A.M.Sukhovoj, O.Bersillon,
S.Joly, G.Graw, D.Hefer and B.Valnion. Nuclear structure of 170Tm from neutroncapture and (d,p) reaction measurements. Phys.Rev. C54 (1996) 78-116.
A16 M.K.Balodis, J.J.Tambergs, J.K.Alksnis, P.T.Prokofjev, W.G.Vonach, H.K.Vonach, H.R.Koch, U.Gruber, B.P.K.Maier and O.W.B.Schult. The level scheme of
176
Lu investigated by (n, ) and (n, e-) reactions. Nucl.Phys. A194 (1972) 305-328.
A17 F.Dubbers, L.Funke, P.Kemnitz, K.D.Schilling, H.Strusny, E.Will, G.Winter and
M.K.Balodis. High spin states in the doubly odd nucleus 178Ta. Nucl.Phys. A315
(1979) 317-333.
A18 J.M.Van den Cruyce, G.Vandenput, L.Jacobs, P.H.M.Van Assche, H.A.Baader,
D.Breitig, H.R.Koch, J.K.Alksnis, J.J.Tambergs, M.K.Balodis, P.T.Prokofjev,
W.Delang, P.Gottel and H.Seyfarth. Nuclear levels in the doubly odd 218Ta
nucleus. Phys.Rev. C20 (1979) 504-527.