Identification of {sup 162}Gd and a new type of identical bands

Journal Article · Mon Dec 21 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57253· OSTI ID:21207808

Jones, E F; Gore, P M; Hamilton, J H; Ramayya, A V; Dodder, R S; Beyer, C J; Hwang, J K; Zhang, X Q; Kormicki, J ^[1]; Zhu, S J ^[1]; Lima, A P. de ^[2]; Cole, J D; Aryaeinejad, R ^[3]; Ma, W C ^[4]; Ter-Akopian, G M; Daniel, A V ^[1]; Oganessian, Yu Ts ^[5]; Rasmussen, J O; Asztalos, S J; Lee, I Y ^[6]

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1. Physics Department, Vanderbilt University, Nashville, Tennessee 37235 (United States)
2. Physics Department, Vanderbilt University, Nashville, Tennessee 37235 (United States) and Physics Department, University of Coimbra, 3000 Coimbra (Portugal)
3. Idaho National Engineering Laboratory, Idaho Falls, Idaho 83415-2114 (United States)
4. Physics Department, Mississippi State University, Mississippi State, Mississippi 39762 (United States)
5. Joint Institute for Nuclear Research, Dubna 141980 (Russian Federation)
6. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

From {gamma}-{gamma}-{gamma} coincidence measurements in spontaneous fission of {sup 252}Cf, level energies were established to spins 14{sup +} to 20{sup +} in many neutron-rich nuclei. New isotope {sup 162}Gd was identified. Yrast bands of {sup 152,154,156}Nd, {sup 156,158,160}Sm, and {sup 160,162}Gd exhibit near-identical transition energies and moments of inertia (MOI) shifted by the same constant amounts for every spin state from 2{sup +} to 12{sup +} or 14{sup +} for nuclei differing by 2n, 4n, 2p, 4p, {alpha}, {alpha}+2p, and {alpha}+2n. These shifted identical bands (SIB) are a new phenomenon. Analysis of all known even-even proton- to neutron-rich nuclei from Ba(Z=56) to Os(Z=76) reveal no SIB for proton-rich nuclei and few cases of SIB for the most neutron-rich pairs around N=98-102 separated by 2n and 2p.

• OSTI ID: 21207808
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 455; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALIFORNIUM 252
COINCIDENCE SPECTROMETRY
ENERGY LEVELS
GADOLINIUM 160
GADOLINIUM 162
GAMMA SPECTROSCOPY
MOMENT OF INERTIA
NEODYMIUM 152
NEODYMIUM 154
NEODYMIUM 156
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEAR STRUCTURE
PROTONS
SAMARIUM 156
SAMARIUM 160
SPIN
SPONTANEOUS FISSION
YRAST STATES