Shapes of the neutron-rich Kr88-94 nuclei

Authors
Rzaca-Urban, T Urban, W Kaczor, A Durell, JL Leddy, MJ Jones, MA Phillips, WR Smith, AG Varley, BJ Ahmad, I Morss, LR Bentaleb, H Lubkiewicz, E Schulz, N
Citation
T. Rzaca-urban et al., Shapes of the neutron-rich Kr88-94 nuclei, EUR PHY J A, 9(2), 2000, pp. 165-169
Citations number
14
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL A
ISSN journal
14346001 → ACNP
Volume
9
Issue
2
Year of publication
2000
Pages
165 - 169
Database
ISI
SICI code
1434-6001(200010)9:2<165:SOTNKN>2.0.ZU;2-3
Abstract
Neutron-rich, Kr88-94 nuclei, populated in spontaneous fission of Cm-248, h ave been studied with EUROGAM 2, by measuring prompt gamma -rays. Many new excited states in even-even Kr isotopes have been identified. For the first time spins and parities were determined experimentally in these nuclei. Ou r results indicate that the quadrupole deformation of Kr isotopes will appe ar only above N = 58, as observed in Sr and Zr nuclei. The newly found 3(-) level at 1506.4 keV in Kr-90 suggests the exsistence of a new region of in creased octupole correlations, probably associated with the v(d(5/2)h(11/2) ) pair of Deltal = Deltaj = 3 orbitals.