ISSN:
1434-601X
Keywords:
PACS. 21.10.-k Properties of nuclei; nuclear energy levels – 23.20.Lv Gamma transitions and level energies – 25.85.Ca Spontaneous fission – 27.60.+j 90 ≤A≤ 149
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: Neutron-rich, 88-94Kr nuclei, populated in spontaneous fission of 248Cm, have been studied with EUROGAM 2, by measuring prompt γ-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. Our results indicate that the quadrupole deformation of Kr isotopes will appear only above N = 58, as observed in Sr and Zr nuclei. The newly found 3- level at 1506.4 keV in 90Kr suggests the exsistence of a new region of increased octupole correlations, probably associated with the ν(d 5/2 h 11/2) pair of Δl = Δj = 3 orbitals.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100500070033
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