Disappearance of isospin effect in projectile fragmentation at intermediate energy

doi:10.1088/1674-1056/18/11/029

中国物理B ›› 2009, Vol. 18 ›› Issue (11): 4781-4785.doi: 10.1088/1674-1056/18/11/029

Disappearance of isospin effect in projectile fragmentation at intermediate energy

马春旺, 魏慧玲, 王俊阳, 刘高杰

Department of Physics, Henan Normal University, Xinxiang 453007, China

收稿日期:2008-12-07 修回日期:2009-06-03 出版日期:2009-11-20 发布日期:2009-11-20
基金资助:
Project partially supported by the National Natural Science Foundation of China (Grant Nos 10775168 and 10775039), Shanghai Development Foundation for Science and Technology (Grant No 06QA14062), and the State Key Program of Basic Research of China (Grant No 2007CB815004).

Disappearance of isospin effect in projectile fragmentation at intermediate energy

Ma Chun-Wang(马春旺)^† Wei Hui-Ling(魏慧玲), Wang Jun-Yang(王俊阳), and Liu Gao-Jie(刘高杰)

Department of Physics, Henan Normal University, Xinxiang 453007, China

Received:2008-12-07 Revised:2009-06-03 Online:2009-11-20 Published:2009-11-20
Supported by:
Project partially supported by the National Natural Science Foundation of China (Grant Nos 10775168 and 10775039), Shanghai Development Foundation for Science and Technology (Grant No 06QA14062), and the State Key Program of Basic Research of China (Grant No 2007CB815004).

摘要/Abstract

摘要： The 140~MeV/u ^40,48Ca+^9Be and ^58,64Ni+^9Be reactions are simulated by the statistical abrasion ablation model, and the simulation results are compared to the National Superconducting Cyclotron Laboratory (NSCL) experimental data. By comparing the fragment isotopic distributions of ^40,48Ca and ^58,64Ni, we study the isospin effect in the projectile fragmentation induced by the neutron-rich nuclei at intermediate energy experimentally and theoretically. It is found that the isospin effect in projectile fragmentation decreases and even disappears as the violence of the collision increases.

Abstract: The 140 MeV/u ^40,48Ca+ ⁹Be and ^58,64Ni+⁹Be reactions are simulated by the statistical abrasion ablation model, and the simulation results are compared to the National Superconducting Cyclotron Laboratory (NSCL) experimental data. By comparing the fragment isotopic distributions of ^40,48Ca and ^58,64Ni, we study the isospin effect in the projectile fragmentation induced by the neutron-rich nuclei at intermediate energy experimentally and theoretically. It is found that the isospin effect in projectile fragmentation decreases and even disappears as the violence of the collision increases.

Key words: isospin effect, projectile fragmentation, neutron-rich nucleus

中图分类号: (Projectile and target fragmentation)

25.70.Mn

27.50.+e (59 ≤ A ≤ 89) 27.40.+z (39 ≤ A ≤ 58) 24.60.-k (Statistical theory and fluctuations) 21.10.Hw (Spin, parity, and isobaric spin)

马春旺, 魏慧玲, 王俊阳, 刘高杰. Disappearance of isospin effect in projectile fragmentation at intermediate energy[J]. 中国物理B, 2009, 18(11): 4781-4785.

Ma Chun-Wang(马春旺) Wei Hui-Ling(魏慧玲), Wang Jun-Yang(王俊阳), and Liu Gao-Jie(刘高杰). Disappearance of isospin effect in projectile fragmentation at intermediate energy[J]. Chin. Phys. B, 2009, 18(11): 4781-4785.

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Disappearance of isospin effect in projectile fragmentation at intermediate energy

Disappearance of isospin effect in projectile fragmentation at intermediate energy

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