Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8183467 | Nuclear Physics A | 2013 | 9 Pages |
Abstract
We discuss low-lying collective excitations of Î hypernuclei using the self-consistent mean-field approaches. We first discuss the deformation properties of Î hypernuclei in the sd-shell region. Based on the relativistic mean-field (RMF) approach, we show that the oblate deformation for 28Si may disappear when a Î particle is added to this nucleus. We then discuss the rotational excitations of MgÎ25 using the three-dimensional potential energy surface in the deformation plane obtained with the Skyrme-Hartree-Fock method. The deformation of MgÎ25 is predicted to be slightly reduced due to an addition of a Î 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 (RPA) to hypernuclei, and show that a new dipole mode, which we call a soft dipole Î mode, appears in hypernuclei, which can be interpreted as an oscillation of the Î particle against the core nucleus.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
K. Hagino, J.M. Yao, F. Minato, Z.P. Li, M. Thi Win,