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Prog. Theor. Phys. Vol. 102 No. 1 (1999) pp. 89-119

[ Full Text PDF : FREE ACCESS (400K) ]

Quantum Fluctuation Effects on Hyperfragment Formation from Ξ- Absorption at Rest on 12C

Yuichi Hirata, 1,*) Yasushi Nara, 2 Akira Ohnishi, 1 Toru Harada 3 and Jørgen Randrup 4

1Division of Physics, Graduate School of Science
Hokkaido University, Sapporo 060-0810, Japan
2Advanced Science Research Center, Japan Atomic Energy Research Institute
Tokai, Ibaraki, 319-1195, Japan
3Department of Social Information, Sapporo Gakuin University
Ebetsu 069-8555, Japan
4Nuclear Science Division 70A-3307, Lawrence Berkeley National Laboratory
Berkeley, California 94720, USA

(Received November 25, 1997)

Abstract:

Formation mechanisms of single, twin and double hypernuclei from Ξ- absorption at rest on 12C are investigated with a refined microscopic transport model that incorporates the recently developed quantal Langevin treatment into antisymmetrized molecular dynamics. With a choice of the fluctuation strength that describes dynamical fragmentation processes in the p+12C reaction at 45 MeV quite well, the quantum fluctuations suppress the formation probability of double hyperfragments to around 10%, which is comparable to the experimental data, and the dynamical formation of twin hyperfragment can be described qualitatively.


URL : http://ptp.ipap.jp/link?PTP/102/89/
DOI : 10.1143/PTP.102.89


*) E-mail: hirata@nucl.sci.hokudai.ac.jp  Fax: +81-11-706-4926

[ Full Text PDF : FREE ACCESS (400K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 105 No. 1 (2001) pp. 131-159 :
    Multifragmentation and a Liquid-Gas Transition of a Nuclear System Studied with AMD-MF and Gogny Effective Interaction
    Yoshio Sugawa and Hisashi Horiuchi

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