Nuclear Binding Mechanism and Structure of Neutron-Rich Be and B Isotopes by Molecular-Orbital Model
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概要
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The neutron-rich (n-rich) Be and B isotopes are investigated by a molecular-orbital model, which is constructed on the α-α cluster structure of ^8Be. Total energies of the ground states and some excited states are calculated with a density- and starting-energy-dependent effective interaction, including rearrangement effects. The absolute values of the binding energies and the general trend of their isotope dependence are well reproduced for nuclei up to ^<16>Be and ^<17>B. It is found that not only the density- and starting-energy-dependence of the effective interaction, but also the spin-orbit potential has important effects on the particle stability of n-rich nuclei, especially, extremely n-rich nuclei. It is also found that the α-α cluster structure as a corepersists in these isotopes, especially in non-normal parity states. The spin-orbit potential reduces clustering in nuclei up to the neutron-closed shell nucleus and, on the other hand, it enhances clustering in extremely n-rich nuclei. Our model easily reproduces the non-normal parity states of ^9Be (1/ 2_1^+: 1.68 MeV) and ^<11>Be (1/ 2^+: ground state) in very low energy regions and is useful for explanation of low-lying level structure of Be and B isotopes.
- 理論物理学刊行会の論文
- 1981-01-25
著者
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KOHNO Michio
Physics Division, Kyushu Dental College
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Kohno Michio
Department Of Physics Kyoto University
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Kohno Michio
Department Of Physics Faculty Of Science Kyoto University
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NAGATA Sinobu
Department of Physics, Kyoto University
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SEYA Michio
Department of Physics, Faculty of Science, Kyoto University
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Seya Michio
Department Of Physics Faculty Of Science Kyoto University
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Nagata Sinobu
Department Of Applied Physics Faculty Of Engineering Miyazaki University
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NAGATA Sinobu
Department of Computer Science and Systems Engineering, Miyazaki University
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NAGATA Sinobu
Department of Applied Physics, Miyazaki University
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NAGATA Sinobu
Department of Applied Physics, Faculty of Engineering, Miyazaki University
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