Identification of levels in {sup 159}Sm and high spin states in {sup 89,91}Kr

Journal Article · Tue Jul 15 04:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.017303· OSTI ID:21192076

Hwang, J K; Ramayya, A V; Hamilton, J H; Li, K; Goodin, C ^[1]; Luo, Y X ^[1]; Rasmussen, J O ^[2]; Zhu, S J ^[1]

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1. Physics Department, Vanderbilt University, Nashville, Tennessee 37235 (United States)
2. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

The high spin excited states of neutron-rich nuclei {sup 159}Sm and {sup 89,91}Kr are identified for the first time from the spontaneous fission of {sup 252}Cf. Six excited states and six {gamma} transitions in {sup 159}Sm are reported here for the first time. Five and two new {gamma} transitions are identified in {sup 89}Kr and {sup 91}Kr, respectively. Level schemes in {sup 89,91}Kr are interpreted as the 2d{sub 5/2} neutron hole configuration weakly coupled to the neighboring even-even Kr nuclei. A possible yrast spin sequence of 11/2{sup -}-9/2{sup +}-5/2{sup +} is suggested in {sup 89}Kr. A rotational band with the proposed configuration of {nu}5/2[523] is observed in {sup 159}Sm.

• OSTI ID: 21192076
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 78; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALIFORNIUM 252
CONFIGURATION
EXCITED STATES
GAMMA RADIATION
HIGH SPIN STATES
HOLES
KRYPTON 89
KRYPTON 91
NEUTRON-RICH ISOTOPES
NEUTRONS
ROTATIONAL STATES
SAMARIUM 159
SPIN
SPONTANEOUS FISSION