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High-spin structure of normal-deformed bands in Zr-84

Cardona, R.; Christiancho, F.; Tabor, S.L.; Ragnarsson, Ingemar LU and al., et (2003) In Physical Review C: covering nuclear physics 68. p.1-024303
Abstract
The reaction Ni-58(S-32,alpha2p) at E-lab=135 MeV was used to populate high-spin states in Zr-84. The complete GAMMASPHERE and MICROBALL arrays were used to obtain clean gamma-gamma-gamma line shapes to be analyzed by the Doppler shift attenuation method and to determine 27 lifetimes in the ground-state band and in two excited bands. Side-feeding times were also measured by comparing the line shapes gated with transitions above and below the state under study. The deduced electric quadrupole moments for the ground-state band are consistent with a very slow reduction with frequency with values ranging between 2.4(3) and 2.0(1)e b. The negative-parity bands feature also an approximate constancy of quadrupole moment with values similar to... (More)
The reaction Ni-58(S-32,alpha2p) at E-lab=135 MeV was used to populate high-spin states in Zr-84. The complete GAMMASPHERE and MICROBALL arrays were used to obtain clean gamma-gamma-gamma line shapes to be analyzed by the Doppler shift attenuation method and to determine 27 lifetimes in the ground-state band and in two excited bands. Side-feeding times were also measured by comparing the line shapes gated with transitions above and below the state under study. The deduced electric quadrupole moments for the ground-state band are consistent with a very slow reduction with frequency with values ranging between 2.4(3) and 2.0(1)e b. The negative-parity bands feature also an approximate constancy of quadrupole moment with values similar to those in the ground-state band. Cranking calculations agree with this behavior in both parity bands and suggest an interpretation of the upper states in the ground-state band as part of a very slowly terminating band. Shell-dependent cranked Nilsson calculations explain a fourth gamma cascade as pertaining to a noncollective structure terminating at I=20(+). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C: covering nuclear physics
volume
68
pages
1 - 024303
publisher
American Physical Society
external identifiers
  • WOS:000185193000016
DOI
10.1103/PhysRevC.68.024303
language
English
LU publication?
yes
id
f134b3e5-c98f-4c4a-9d99-f6c5ced6191c (old id 700072)
date added to LUP
2007-12-06 10:53:42
date last changed
2016-04-16 08:25:56
@misc{f134b3e5-c98f-4c4a-9d99-f6c5ced6191c,
  abstract     = {The reaction Ni-58(S-32,alpha2p) at E-lab=135 MeV was used to populate high-spin states in Zr-84. The complete GAMMASPHERE and MICROBALL arrays were used to obtain clean gamma-gamma-gamma line shapes to be analyzed by the Doppler shift attenuation method and to determine 27 lifetimes in the ground-state band and in two excited bands. Side-feeding times were also measured by comparing the line shapes gated with transitions above and below the state under study. The deduced electric quadrupole moments for the ground-state band are consistent with a very slow reduction with frequency with values ranging between 2.4(3) and 2.0(1)e b. The negative-parity bands feature also an approximate constancy of quadrupole moment with values similar to those in the ground-state band. Cranking calculations agree with this behavior in both parity bands and suggest an interpretation of the upper states in the ground-state band as part of a very slowly terminating band. Shell-dependent cranked Nilsson calculations explain a fourth gamma cascade as pertaining to a noncollective structure terminating at I=20(+).},
  author       = {Cardona, R. and Christiancho, F. and Tabor, S.L. and Ragnarsson, Ingemar and al., et},
  language     = {eng},
  pages        = {1--024303},
  publisher    = {ARRAY(0xaddfee8)},
  series       = {	Physical Review C: covering nuclear physics},
  title        = {High-spin structure of normal-deformed bands in Zr-84},
  url          = {http://dx.doi.org/10.1103/PhysRevC.68.024303},
  volume       = {68},
  year         = {2003},
}