2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 4, 217-220

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 $\rho_f$ 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


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