Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference
Ma, CW; Ding, TT; Qiao, CY; Cao, XG; Ma, CW (reprint author), Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China.
2015
发表期刊PHYSICAL REVIEW C
ISSN0556-2813
卷号92期号:6页码:
文章类型期刊文献
摘要Background: Temperature is an important parameter in studying many important questions in heavy-ion collisions. A thermometer based on the isobaric yield ratio (IYR) has been proposed [Ma et al., Phys. Rev. C 86, 054611 (2012); 88, 014609 (2013)]. Purpose: An improved thermometer (TIB) is proposed based on the difference between IYRs. TIB obtained from isobars in different reactions will be compared. Methods: The yields of three isobars are employed in TIB. The residual free energy of the three isobars are replaced by that of the binding energy. No secondary decay modification for odd A fragment is used in TIB. Results: The measured fragment yields in the 140A MeV Ca-40,Ca-48+Be-9 (Ta-181) and Ni-58,Ni-64+Be-9 (Ta-181), the 1A GeV Xe-124,Xe-136+Pb, and the Sn-112,Sn-124+Sn-112,Sn-124 reactions have been analyzed to obtain TIB from IMFs. TIB from most of the fragments in the Ca-40,Ca-48 and Ni-58,Ni-64 reactions is in the range of 0.6 MeV < T-IB < 3.5MeV. T-IB from most of the fragments in the Xe-124 and Sn-112,Sn-124 reactions is in the range of 0.5 MeV < T-IB < 2.5 MeV, while the range is 0.5 MeV < T-IB < 4 MeV from most of the fragments in the Xe-136 reaction. In general, for most of the fragments T-IB in the Ca-40,Ca-48 and Ni-58,Ni-64 reactions are very similar (except in the very neutron-rich fragments), and TIB from IMFs in the Xe-124,Xe-136 and Sn-112,Sn-124 reactions is also similar. A slight dependence of TIB on A is found. Conclusions: Using the binding energy of the nucleus, TIB can be obtained without knowledge of the free energies of fragments. In the investigated reactions, TIB from most of the IMFs is low.
关键词Gas Phase-transition Neutron-rich Nuclei Symmetry Energy Temperature Density Matter Entropy
语种英语
WOS记录号WOS:000365867700001
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/24951
专题中科院上海应用物理研究所2011-2018年
通讯作者Ma, CW (reprint author), Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China.
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Ma, CW,Ding, TT,Qiao, CY,et al. Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference[J]. PHYSICAL REVIEW C,2015,92(6):—.
APA Ma, CW,Ding, TT,Qiao, CY,Cao, XG,&Ma, CW .(2015).Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference.PHYSICAL REVIEW C,92(6),—.
MLA Ma, CW,et al."Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference".PHYSICAL REVIEW C 92.6(2015):—.
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