Three-Body Binding and Resonant Mechanisms in Neutron-Rich Light Nuclei Far from Stability Line : Pairing Correlation in Borromean Nuclei
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概要
- 論文の詳細を見る
We study the typical Borromean systems of ^4He+n+n for ^6He and of ^9Li+n+n for ^<11>Li. In addition to these three body systems, we investigate the ^8He+n+n ground resonance state in ^10He. In understanding the binding mechanism of these loosely or unbound systems of the core+two valence neutrons, it is shown that the pairing correlation between valence neutrons becomes important. For the excited resonance states in ^6He and for the ground resonance state in ^10He, we extensively use the complex scaling method (CSM) to solve the three body resonance problems. The CSM is shown to be very useful not only for analysis of the observed 2^+ state in ^6He and the ground state in ^10He but also for prediction of three new 2^+_2, 1^+_1 and 0^+_2 resonance states in ^6He. These results present that the core+n+n model explains characteristic properties of ^6He. On the other hand, we discuss that a ^9Li+n+n model for ^<11>Li is not so simple as the ^6He case. To solve the binding energy problem, the ^9Li-n interaction is investigated in detail. Our much interest is concentrated on the the pairing correlation not only between valence neutrons but also between neutrons in the ^9Li-core. By taking into account pairing configurations in addition to the simple neutron (p_<3/2>)-closed configuration, we show that the pairing blocking effect of core neutrons plays a very important role in understanding the low-lying single particle s-state in ^<10>Li and the strong state-depending ^9Li-n interaction. As a possibility of the experimental checking for the low-lying s-state in ^<10>Li, we discuss the observation of the so-called Thomas-Ehrman shift in the mirror nucleus ^<10>N, which has not been observed yet.
- 理論物理学刊行会の論文
- 2001-08-22
著者
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KATO Kiyoshi
Division of Physics, Graduate School of Science, Hokkaido University
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池田 清美
理研
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IKEDA Kiyomi
The Institute of Physical and Chemical Research (RIKEN)
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池田 清美
東大理
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池田 清美
日大理工
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池田 清美
Дysнa(cccp)
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AOYAMA Shigeyoshi
Information Processing Center, Kitami Institute of Technology
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AOYAMA Shigeyoshi
Integrated Information Processing Center, Niigata University
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AOYAMA Shigeyoshi
Graduate Scool of Science, Hokkaido University
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Aoyama S
Integrated Information Processing Center Niigata University
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Aoyama Shigeyoshi
Information Processing Center Kitami Institute Of Technology
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Kato Kiyoshi
Division Of Physics Graduate School Of Science Hokkaido University
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KATO Kiyoshi
Division of Endocrinology and Metabolism, Department of Homeostatic Regulation and Development, Niigata University Graduate School of Medical and Dental Sciences
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