A Variety Of Particle Alignments In N {approx_equal} Z Nuclei

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

DOI:https://doi.org/10.1063/1.2200983· OSTI ID:20798595

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

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

We study the structure of the N {approx_equal} Z nuclei around A {approx} 64 using the shell model with an extended P + QQ Hamiltonian in the configuration space (p3/2, f5/2, p1/2, g9/2). This framework provides a consistent and good description of energy levels, moments of inertia and Q moments in Ge isotopes. We investigate particle alignments in even-even nuclei 64-70Ge, 60-68Zn, and 68Se, in odd-odd N = Z nuclei 62Ga and 66As, and in odd-mass nuclei 67As and 69As. It is shown that in these N {approx_equal} Z nuclei structure changes in sequences of the positive- and negative-parity states are caused by various types of particle alignments in the g9/2 orbit. Interestingly enough, one-proton-one-neutron (1p1n) alignment takes place not only in odd-odd N = Z nuclei but also both in even-even nuclei and odd-mass nuclei. A similar mechanism causes competing occupations of a proton and a neutron in the g9/2 orbit, in odd-proton nuclei 67As and 69As.

• OSTI ID: 20798595
• 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
ARSENIC 69
ENERGY LEVELS
GALLIUM 62
GERMANIUM 70
HAMILTONIANS
MOMENT OF INERTIA
NEUTRONS
NUCLEAR STRUCTURE
ORBITS
PARITY
PROTONS
SELENIUM 68
SHELL MODELS
ZINC 68