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Statistical nature of cluster emission in nuclear liquid-vapour phase coexistence | | Y. G. Ma
; D. D. Han
; W. Q. Shen
; X. Z. Cai
; J. G. Chen
; Z. J. He
; J. L.Long
; G. L. Ma
; K. Wang
; Y. B. Wei
; L. P. Yu
; H. Y. Zhang
; C. Zhong
; X. F. Zhou
; Z. Y. Zhu
; | | Date: |
10 Jun 2004 | | Journal: | J.Phys. G30 (2004) 13-26 | | Subject: | nucl-th | | Abstract: | The emission of nuclear clusters is investigated within the framework of isospin dependent lattice gas model and classical molecular dynamics model. It is found that the emission of individual cluster which is heavier than proton is almost Poissonian except near the transition temperature at which the system is leaving the liquid-vapor phase coexistence and the thermal scaling is observed by the linear Arrhenius plots which is made from the average multiplicity of each cluster versus the inverse of temperature in the liquid vapor phase coexistence. The slopes of the Arrhenius plots, {it i.e.} the "emission barriers", are extracted as a function of the mass or charge number and fitted by the formula embodied with the contributions of the surface energy and Coulomb interaction. The good agreements are obtained in comparison with the data for low energy conditional barriers. In addition, the possible influences of the source size, Coulomb interaction and "freeze-out" density and related physical implications are discussed. | | Source: | arXiv, nucl-th/0406029 | | Services: | Forum | Review | PDF | Favorites | |
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