Coexisting intruder bands in /sup 83/Se and evidence for the role of proton subshell closure in inhibiting formation of odd-neutron intruder bands
Low-lying one-particle, two-hole (1p-2h) intruder bands which coexist with hole states are established in /sup 83/Se (N = 49) and are shown to exhibit properties similar to those of known intruder bands in odd-proton In (Z = 49) nuclei. Systematics of N = 49 nuclei show that /sup 83/Se (Z = 34) has the lowest-lying 1p-2h intruder state rather than midshell /sup 89/Zr (Z = 40) as would be expected by comparing with the In isotopes. We discuss the well established occurrence of intruder bands in odd-proton nuclei in contrast to the paucity of such bands in odd-neutron nuclei, and suggest that the Z = 40 and 64 subshell closures inhibit the core collectivity necessary for the lowering of particle states and formation of intruder bands in odd-neutron nuclei.
- Research Organization:
- Nuclear Chemistry Division, Lawrence Livermore National Laboratory, Livermore, California 94550
- OSTI ID:
- 5754836
- Journal Information:
- Phys. Rev. C; (United States), Vol. 25:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fully automated radiochemical preparation system for gamma-sectroscopy on fission products and the study of the intruder and vibrational levels in /sup 93/Se
Intruder state collectivity at a double subshell closure from the beta decay of 0/sup -/ /sup 96/Y/sup g/ to the levels of /sup 96/Zr
Related Subjects
ARSENIC 83
BETA-MINUS DECAY
SELENIUM 83
ENERGY LEVELS
E2-TRANSITIONS
GAMMA SPECTRA
LIFETIME
M1-TRANSITIONS
PARITY
SHELL MODELS
SPIN
ANGULAR MOMENTUM
ARSENIC ISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DECAY
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SELENIUM ISOTOPES
SPECTRA
651622* - Nuclear Properties & Reactions
A=59-89
Experimental- Radioactive Decay- (-1987)
651623 - Nuclear Properties & Reactions
A=59-89
Experimental- Energy Levels & Transitions- (-1987)