dorsal/arxiv
View SchemaStructure of isomeric states in 66As and 67As
| Authors | M. Hasegawa, Y. Sun, K. Kaneko, T. Mizusaki |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0505024 |
| URL | https://arxiv.org/abs/nucl-th/0505024 |
| DOI | 10.1016/j.physletb.2005.05.027 |
| Journal | Phys.Lett. B617 (2005) 150-156 |
Abstract
Strong residual correlations between neutrons and protons in N ~ Z systems 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 orbitals, or a simultaneous occupation of these neutron and proton high-j orbitals.
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"abstract": "Strong residual correlations between neutrons and protons in N ~ Z systems\ncan lead to unusual structure. Using the spherical shell model, we show that a\nlow-excitation shape isomer can occur in the odd-odd N=Z nucleus 66As. This\nextends the picture of shape coexistence beyond even-even nuclei. Furthermore,\nit is demonstrated that in 66As and in the N=Z+1 nucleus 67As, a new type of\nisomer, which we term j-isomer, can be formed. The underlying mechanism for the\nisomerism formation is structure change in the isomeric states, which involves\neither an alignment of a neutron-proton pair from the high-j intruder orbitals,\nor a simultaneous occupation of these neutron and proton high-j orbitals.",
"arxiv_id": "nucl-th/0505024",
"authors": [
"M. Hasegawa",
"Y. Sun",
"K. Kaneko",
"T. Mizusaki"
],
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"nucl-th"
],
"doi": "10.1016/j.physletb.2005.05.027",
"journal_ref": "Phys.Lett. B617 (2005) 150-156",
"title": "Structure of isomeric states in 66As and 67As",
"url": "https://arxiv.org/abs/nucl-th/0505024"
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