| Entropy produced in heavy ion collisions |
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| 作者姓名： | XiHong－Fei ShenWen－Qing |
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| 作者单位： | [1]InstituteofModernPhysics,mtheChineseAcademyofSciences,Lanzhou730000 [2]ShanghaiInstituteofNuclearResearc,mtheChineseAcademyofSciences,Lanzhou730000 |
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| 摘 要： | A new observable,yield ratio of d/(d t ^3He ^4He)produced in heavy ion reactions is suggested as a measure of entropy.It is found that in quantum statistical model (QSM),which is quite commonly used for extracting the entropy,the relation between this ratio and entropy is almost linear and independent of break-up density and N/Z ratio of the system.The experimental data of ^12C ^197Au from 30MeV/u to 84MeV/u and of ^197Au ^197Au from 100McV/u to 250MeV/u are compared with QSM calcuation results.The values of entropy are obtained for C Au and Au Au system without assumption on break-up density.
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| 关 键 词： | 重离子碰撞 熵产生 量子统计模型 |
Entropy produced in heavy ion collisions |
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| Xi Hong Fei ,Zhu Yong Tai ,Shen Wen Qing ,Wei Zhi Yong.Entropy produced in heavy ion collisions[J].Nuclear Science and Techniques,1997,8(3):136-138. |
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| Authors: | Xi Hong Fei Zhu Yong Tai Shen Wen Qing Wei Zhi Yong |
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| Affiliation: | Xi Hong Fei 1,Zhu Yong Tai 1,Shen Wen Qing 2,Wei Zhi Yong 1 |
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| Abstract: | A new observable, yield ratio of d/(d t 3He 4He) produced in heavy ion reactions is suggested as a measure of entropy. It is found that in quantum statistical model (QSM), which is quite commonly used for extracting the entropy, the relation between this ratio and entropy is almost linear and independent of break up density and N/Z ratio of the system. The experimental data of 12 C 197 Au from 30 MeV/u to 84 MeV/u and of 197 Au 197 Au from 100 MeV/u to 250 MeV/u are compared with QSM calculation results. The values of entropy are obtained for C Au and Au Au system without assumption on break up density. |
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| Keywords: | Entropy Heavy ion reactions Quantum statistical model |
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