Short note
Excitation energy as a basic variable to control nuclear disassembly
Y.G. Ma1,2,3 - Q.M. Su2 - W.Q. Shen2 - J.S. Wang2 - D.Q. Fang2 - X.Z. Cai2 - H.Y. Zhang2 - D.D. Han3
1 CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, P.R. China
2 Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China
3 Fudan - T. D. Lee Physics Laboratory, Fudan University, Shanghai 200433, P.R. China
4 East China Normal University, Shanghai 200053, P.R. China
Received: 25 November 1998 /Revised version: 20 January 1999 Communicated by B. Povh
Abstract
Thermodynamical features of Xe system is investigated as functions of
temperature and freeze-out density
in the frame of lattice gas model. The calculation shows
different temperature dependence of physical observables at different
freeze-out density. In this case, the critical temperature when the phase
transition takes place depends on the freeze-out density.
However, a unique critical excitation energy reveals regardless of freeze-out density
when the excitation energy is used as a variable instead of temperature.
Moreover, the different behavior of other physical observables with temperature
due to different 
vanishes when excitation energy replaces temperature.
It indicates that the excitation energy can be seen as a more basic quantity
to control nuclear disassembly.
PACS
05.50.+q Lattice theory and statistics (Ising, Potts, etc.) -
24.60.-k Statistical theory and fluctuations -
25.70.Pq Multifragment emission and correlations
Copyright Springer-Verlag
