Shape Isomer And 'j-Isomer' In 66As And 67As

Journal Article · Wed Apr 26 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2200982· OSTI ID:20798594

Hasegawa, M ^[1]; Sun, Y ^[2]; Kaneko, K ^[3]; Mizusaki, T ^[4]

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1. Laboratory of Physics, Fukuoka Dental College, Fukuoka 814-0193 (Japan)
2. Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)
3. Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503 (Japan)
4. Institute of Natural Sciences, Senshu University, Tokyo 101-8425 (Japan)

Strong proton-neutron correlations in N {approx_equal} Z nuclei can lead to unusual structure. Using the spherical shell model, we show that a low-excitation shape isomer can occur in the odd-odd N = Z nucleus 66As. This extends the picture of shape coexistence beyond even-even nuclei. Furthermore, it is demonstrated that in 66As and in the N = Z + 1 nucleus 67As, a new type of isomer, which we term j-isomer, can be formed. The underlying mechanism for the isomerism formation is structure change in the isomeric states, which involves either an alignment of a neutron-proton pair from the high-j intruder orbits, or a simultaneous occupation of these neutron and proton high-j orbits.

• OSTI ID: 20798594
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 831; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARSENIC 66
ARSENIC 67
CORRELATIONS
EVEN-EVEN NUCLEI
EXCITATION
ISOMERIC NUCLEI
NEUTRONS
ORBITS
PROTONS
SHAPE
SHELL MODELS