Collective excitations of $$Lambda$$ hypernuclei
萩野 浩一*; Yao, J. M.*; 湊 太志; Li, Z. P.*; Thi Win, M.*
Hagino, Koichi*; Yao, J. M.*; Minato, Futoshi; Li, Z. P.*; Thi Win, M.*
We discuss low-lying collective excitations of hypernuclei using the self-consistent mean-field approaches. We first discuss the deformation properties of hypernuclei in the sd-shell region. Based on the relativistic mean-field approach, we show that the oblate deformation of $$^{28}$$Si nucleus may disappear when a particle is added to this nucleus. We then discuss the rotational excitations of $$^{25}$$Mg nucleus using the three-dimensional potential energy surface in the deformation plane obtained with the Skyrme-Hartree-Fock method. The deformation of $$^{25}$$Mg nucleus is predicted to be slightly reduced due to an addition of particle. We demonstrate that this leads to a reduction of electromagnetic transition probability, $$B(E2)$$, in the ground state rotational band. We also present an application of random phase approximation to hypernuclei, and show that a new dipole mode appears in hypernuclei, which can be interpreted as an oscillation of particle against the core nucleus.
使用言語 : English
掲載資料名 : Nuclear Physics A
: 914
ページ数 : p.151 - 159
発行年月 : 2013/09
出版社名 : Elsevier
発表会議名 : 11th International Conference on Hypernuclear and Strange Particle Physics (HYP 2012)
開催年月 : 2012/10
開催都市 : Barcelona
開催国 : Spain
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登録番号 : BB20122967
抄録集掲載番号 : 41001112
論文投稿番号 : 13112
Accesses  (From Jun. 2, 2014)
- Accesses
分野:Physics, Nuclear
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