Symmetry energy from neutron-rich fragments in heavy-ion collisions, and its dependence on incident energy, and impact parameters

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	Symmetry energy from neutron-rich fragments in heavy-ion collisions, and its dependence on incident energy, and impact parameters
	Ma Chun-Wang; Song Heng-Li; Pu Jie; Zhang Tong-Lin; Zhang Sha; Wang Shan-Shan; Zhao Xin-Li; Chen Li
	2013
Source Publication	CHINESE PHYSICS C
ISSN	1674-1137
Volume	37 Issue:2
Abstract	The yields of fragments produced in the Ni-60+C-12 reactions at 80 A and 140 A MeV, and with maximum impact parameters of 1.5, 2 and 7.3 fm at 80 A MeV are calculated by the statistical abrasion-ablation model. The yields of fragments are analyzed by the isobaric yield ratio (IYR) method to extract the coefficient of symmetry energy to temperature (a(sym)/T). The incident energy is found to influence a(sym)/T very little. It's found that a(sym)/T of fragments with the same neutron-excess I = N-Z increases when A increases, while a(sym)/T of isobars decreases when A increases. The a(sym)/T of prefragments is rather smaller than that of the final fragments, and the a(sym)/T of fragments in small impact parameters is smaller than that of the larger impact parameters, which both indicate that a(sym)/T decreases when the temperature increases. The choice of the reference IYRs is found to have influence on the extracted a(sym)/T of fragments, especially on the results of the more neutron-rich fragments. The surface-symmetry energy coefficient (b(s)/T) and the volume-symmetry energy coefficient (b(v)/T) are also extracted, and the b(s)/b(v) is found to coincide with the theoretical results.
Indexed By	SCI
Language	英语
Funding Project	应物所项目组
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/13941
Collection	中科院上海应用物理研究所2011-2019年
Recommended Citation GB/T 7714	Ma Chun-Wang,Song Heng-Li,Pu Jie,et al. Symmetry energy from neutron-rich fragments in heavy-ion collisions, and its dependence on incident energy, and impact parameters[J]. CHINESE PHYSICS C,2013,37(2).
APA	Ma Chun-Wang.,Song Heng-Li.,Pu Jie.,Zhang Tong-Lin.,Zhang Sha.,...&Chen Li.(2013).Symmetry energy from neutron-rich fragments in heavy-ion collisions, and its dependence on incident energy, and impact parameters.CHINESE PHYSICS C,37(2).
MLA	Ma Chun-Wang,et al."Symmetry energy from neutron-rich fragments in heavy-ion collisions, and its dependence on incident energy, and impact parameters".CHINESE PHYSICS C 37.2(2013).

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