Entropy produced in 35MeV/u <sup>40</sup>Ar + <sup>197</sup>Au Heavy ion reactions

	Entropy produced in 35MeV/u ⁴⁰Ar + ¹⁹⁷Au Heavy ion reactions
	Wei, Zhi-Yong ; Duan, Li-Min; Wu, He-Yu ; Jin, Gen-Ming ; Li, Zu-Yu ; Zhu, Yong-Tai ; Xi, Hong-Fei ; Shen, Wen-Qing ; Xiao, Zhi-Gang ; Wang, Hong-Wei
刊名	Wuli Xuebao/Acta Physica Sinica
	2001
卷号	50 页码:653-654
ISSN号	1000-3290
英文摘要	Light charged particles emitted from the reactions of 35MeV/u ⁴⁰Ar + ¹⁹⁷Au are measured experimentally. A new observable, R = d/(d + t + ³He + ⁴He), which is defined as the reduced yield of deuterons, has a monotone relation with the entropy and it is independent of the breakup density (ρ/ρ₀) and N/Z of the system. The entropy values are extracted by using several methods which use the d/p ratios, d_like/p_like ratios, reduced yield of isotope deuterons R and the reduced multiplicity of charged particles M_red, respectively. The entropy values from the reduced yield of isotope deuterons R and the reduced multiplicity of charged particles M_red are nearly the same. These methods can be used in low beam energy heavy ion reactions. The charged particles emitted in rear angles are mainly from an equilibrium-state source with temperature about 4.7 ± 1.2MeV, which are extracted from the double isotope yields ratios, and entropy S/A = 2.5 ± 0.5. This implies that the Break-up density is slightly less than 0.1 (ρ/ρ₀).
出版者	Science Press
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/64345]
专题	中国科学院近代物理研究所
作者单位	1.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China 2.Shanghai Inst. of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China
推荐引用方式 GB/T 7714	Wei, Zhi-Yong,Duan, Li-Min,Wu, He-Yu,et al. Entropy produced in 35MeV/u ⁴⁰Ar + ¹⁹⁷Au Heavy ion reactions[J]. Wuli Xuebao/Acta Physica Sinica,2001,50:653-654.
APA	Wei, Zhi-Yong.,Duan, Li-Min.,Wu, He-Yu.,Jin, Gen-Ming.,Li, Zu-Yu.,...&Hu, Rong-Jiang.(2001).Entropy produced in 35MeV/u ⁴⁰Ar + ¹⁹⁷Au Heavy ion reactions.Wuli Xuebao/Acta Physica Sinica,50,653-654.
MLA	Wei, Zhi-Yong,et al."Entropy produced in 35MeV/u ⁴⁰Ar + ¹⁹⁷Au Heavy ion reactions".Wuli Xuebao/Acta Physica Sinica 50(2001):653-654.