Zero-sound branches in asymmetric nuclear matter

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• 作者：V. A. Sadovnikova ; M. A. Sokolov
• 刊名：Bulletin of the Russian Academy of Sciences: Physics
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：80
• 期：8
• 页码：981-984
• 全文大小：443 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics<br>Nuclear Physics, Heavy Ions and Hadrons<br>Russian Library of Science<br>
• 出版者：Allerton Press, Inc. distributed exclusively by Springer Science+Business Media LLC
• ISSN：1934-9432
• 卷排序：80

文摘

A polarization operator constructed in the random phase approximation is used to obtain zero-sound excitations in isospin asymmetric nuclear matter (ANM). Two families of the complex solutions ωb>sτb>(k),τ= p,n are presented. The imaginary part of the solutions corresponds to the damping of the collective mode due to its overlapping with the particle-hole modes and the subsequent emission of a proton (ωb>spb>(k)) or a neutron (ωb>snb>(k)). The dependence of the solutions on the asymmetry parameter is studied.