Isospin Effects on Multifragmentation of Light Mass System

CHEN Bo; LIU JianYe; ZHANG FengShou; CHEN LieWen; ZHAO Qiang; ZUO Wei

Chinese Physics C> 2000, Vol. 24> Issue(3) : 244-249

Isospin Effects on Multifragmentation of Light Mass System

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
The influence of isospin effects on the multifragmentation in the head-on collisions of the system ⁴⁰Ca+⁴⁰Ca and ⁴⁰Ar+⁴⁰Ar for different incident energies is discussed by using isospin dependent quantum molecular dynamics model (IQMD). It is found that the intermediate mass fragment (IMF) has obvious difference at high incident energy, because the nucleon-nucleon cross section effects is major in the process of heavy ion collision. Thus, we have some opportunities to extract the information of nucleon-nucleon cross section. At low energy various isospin effects affect each other, resulting in no obvious difference in the IMF between two systems.

References

[1]

CHEN LieWen, ZHANG FengShou, JIN GenMin. Phys. Rev., 1998, C58:2283;CHEN LieWen, ZHANG FengShou, ZENG XiangHua et al. High Energy Physics and Nuclear Physics (in Chinese), 1998, 22: 1035(陈列文,张丰收,曾样华等高能物理与核物理,1998,22:1035)2 LI B A, KO C M, Baner W. Inter. Jour. Mod. Phys. E., 1998, 2:147–229 3 ZHANG FengShou, GE LinXiao. Nuclear Multifragmentation(in Chinese), Beijing: the Scientific Press, 1998(张丰收,葛凌霄原子核多重碎裂,北京:科学出版社,1998)4 Aichelin J. Phys. Rev., 1998, C37:24515 LIU J Y, GE Y C, YANG F Z. Z. Phys., 1993, A345:187;LIU J Y, ZHANG S G. Z. Phys., 1994, A348: 31;LIU H, LIU J Y. Z. Phys., 1996, A354:3116 CHEN K et al. Phys. Rev., 1968, 166: 949

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CHEN Bo, LIU JianYe, ZHANG FengShou, CHEN LieWen, ZHAO Qiang and ZUO Wei. Isospin Effects on Multifragmentation of Light Mass System[J]. Chinese Physics C, 2000, 24(3): 244-249.

CHEN Bo, LIU JianYe, ZHANG FengShou, CHEN LieWen, ZHAO Qiang and ZUO Wei. Isospin Effects on Multifragmentation of Light Mass System[J]. Chinese Physics C, 2000, 24(3): 244-249. shu

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Received: 1998-12-09
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Isospin Effects on Multifragmentation of Light Mass System

Corresponding author: CHEN Bo,

Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China2 Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 1998-12-09
Accepted Date: 1900-01-01
Available Online: 2000-03-05

Abstract: The influence of isospin effects on the multifragmentation in the head-on collisions of the system ⁴⁰Ca+⁴⁰Ca and ⁴⁰Ar+⁴⁰Ar for different incident energies is discussed by using isospin dependent quantum molecular dynamics model (IQMD). It is found that the intermediate mass fragment (IMF) has obvious difference at high incident energy, because the nucleon-nucleon cross section effects is major in the process of heavy ion collision. Thus, we have some opportunities to extract the information of nucleon-nucleon cross section. At low energy various isospin effects affect each other, resulting in no obvious difference in the IMF between two systems.