Critical phenomena of a nuclear system in alternative ZM models

Critical phenomena of a nuclear system in alternative ZM models 1 2 first-author 1Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000 1Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000 2Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, Shanghai 201800 2Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, Shanghai 201800 Alternative versions of the ZM model are extended to asymmetric nuclear matter by including ρ meson degree of freedom in the Lagrangian. The extended models are then used to study the thermodynamical properties of asymmetric nuclear matter at finite temperature. The critical temperature for a liquid- gas phase transition in nuclear matter and its dependence on asymmetry parameter are calculated. The limiting temperature T lim , which reflects Coulomb instability of hot nuclei, is studied. The calculated results are compared with that given by the original ZM model. Critical phenomena Nuclear matter ZM model References Siemens P J . Nature(London) , 1983 , 305 : 410 Nature(London) Elliot J B et al . Phys Rev , 1994 , C49 : 3185 Phys Rev ALADIN/LAND Collaboration , Pochodzalla J et al . Phys Rev Lett , 1995 , 75 : 1040 Phys Rev Lett Levit S , Bonche P . Nucl Phys , 1985 , A437 : 426 Nucl Phys Serot B D , Walecka J D . In: Advances in Nuclear Physics , Negele J W , Vogt E ed. Vol. 16 , ( New York : Plenum , 1986 ) Advances in Nuclear Physics Boguta J , Bodmer A R . Nucl Phys , 1977 , A 292 : 413 Nucl Phys Zimanyi J , Moszkowski S A . Phys Rev , 1990 , C42 : 1416 Phys Rev Saito K , Thomas A W . Phys Lett , 1994 , B327 : 9 Phys Lett Song H Q , Qian Z X , Su R K . Phys Rev , 1994 , C49 : 2924 Phys Rev Delfino A , Coelho C T , Malheiro M . Phys Rev , 1995 , C51 : 2188 Phys Rev Malheiro M , delfino A , Coelho C T . Phys Rev , 1998 , C58 : 426 Phys Rev Chiapparini M , Delfino A , Malheiro M et al . Z Phys , 1997 , A357 : 47 Z Phys Goodman A L , Kapusta J I , Mekjian A Z . Phys Rev , 1984 , C30 : 851 Phys Rev Song H Q , Su R K . Phys Rev , 1991 , C44 : 2505 Phys Rev Natowitz J B et al . Phys Rev , 1995 , C52 : R2322 Phys Rev Wada R et al . Phys Rev , 1989 , C39 : 497 Phys Rev O572.33, O571.42 + 5 Supported in part by National Natural Science Foundation of China under (19675060) and Chinese cademy of Sciences under contract (KJ951-A1-410) 2000-01-04 2000-08-01 2021-02-05 2000 Nuclear Science and Techniques 3 11