2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 7, 355-360

Isospin effects on the GDR in Vlasov Method

J.S. Wang2 - W.Q. Shen1,2 - Y.H. Cai1,2,4 - Y.G. Ma1,2,3 - J. Feng1,2 - D.Q. Fang2 - X.Z. Cai2 - Q.M. Su2

1 CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China
2 Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, P.R. China
3 Fudan-T.D.Lee Physics Laboratory, Fudan University, Shanghai, 200433, P.R. China
4 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou, 730000, P.R. China

Received: 20 February 1999 / Revised version: 21 May 1999 Communicated by P. Schuck

Abstract
The systematics of the isovector Giant Dipole Resonance (GDR) is studied via the microscopic semi-classical Vlasov method. The calculated results of the peak energy and the widths (FWHM) of the GDR strength distribution can reproduce the experimental data and follow the empirical formula. The isospin effects on the peak energy and the widths of the GDR strength distribution are found small and these effects increase slightly with the (N-Z)/A. The characteristics of the GDR have been studied as a function of the temperature in very heavy compound systems (A>300). The interplay between one-body damping and two-body damping is also discussed.

PACS
24.30.Cz Giant resonance - 20.60.Ev collective model


Copyright Società Italiana di Fisica, Springer-Verlag 2000