期刊
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
卷 39, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0954-3899/39/8/085111
关键词
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资金
- US DOE [DE-FC02-07ER41457, DE-FG02-06ER4140]
- JSPS
- Helmholtz Association [HA216/EMMI]
- [20244 022]
- [22540 290]
- Grants-in-Aid for Scientific Research [23244049] Funding Source: KAKEN
Understanding and predicting the formation of shell structure from nuclear forces is a central challenge for nuclear physics. While the magic numbers N = 2, 8, 20 are generally well understood, N = 28 is the first standard magic number that is not reproduced in microscopic theories with two-nucleon forces. In this paper, we show that three-nucleon forces give rise to repulsive interactions between two valence neutrons that are key to explain Ca-48 as a magic nucleus, with a high 2(+) excitation energy and a concentrated magnetic dipole transition strength. The repulsive three-nucleon mechanism improves the agreement with experimental binding energies.
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