Modification of triaxial deformation and change of spectrum in Λ25Mg caused by the Λ hyperon

Masahiro Isaka, Hiroaki Homma, Masaaki Kimura, Akinobu Doté, and Akira Ohnishi
Phys. Rev. C 85, 034303 – Published 6 March 2012

Abstract

The positive-parity states of Λ25Mg with a Λ hyperon in s orbit were studied with the antisymmetrized molecular dynamics for hypernuclei. We discuss two bands of Λ25Mg corresponding to the Kπ=0+ and 2+ bands of 24Mg. It is found that the energy of the Kπ=2+Λs band is shifted up by about 200 keV compared to 24Mg. This is because the Λ hyperon in s orbit reduces the quadrupole deformation of the Kπ=0+Λs band, while it does not change the deformation of the Kπ=2+Λs band significantly.

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  • Received 9 August 2011

DOI:https://doi.org/10.1103/PhysRevC.85.034303

©2012 American Physical Society

Authors & Affiliations

Masahiro Isaka, Hiroaki Homma, and Masaaki Kimura

  • Department of Physics, Hokkaido University, Sapporo 060-0810, Japan

Akinobu Doté

  • Institute of Particle and Nuclear Studies, KEK, Tsukuba, Ibaraki 305-0801, Japan

Akira Ohnishi

  • Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan

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Issue

Vol. 85, Iss. 3 — March 2012

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