Isotope Ratios of Light Charged Particles and Temperature in the Reactions 30MeV/u40Ar+112,124Sn

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XIAO Zhi-Gang, WU He-Yu, JIN Gen-Ming, WANG Hong-Wei, HU Rong-Jiang, LIU Yong-Ying, LI Zu-Yu, DUAN Li-Min, ZHANG Bao-Guo, WEI Zhi-Yong, WANG Su-Fang, ZHU Yong-Tai, ZHU Hai-Dong and LU Zhao-Hui. Isotope Ratios of Light Charged Particles and Temperature in the Reactions 30MeV/u40Ar+112,124Sn[J]. Chinese Physics C, 2001, 25(11): 1071-1076.
XIAO Zhi-Gang, WU He-Yu, JIN Gen-Ming, WANG Hong-Wei, HU Rong-Jiang, LIU Yong-Ying, LI Zu-Yu, DUAN Li-Min, ZHANG Bao-Guo, WEI Zhi-Yong, WANG Su-Fang, ZHU Yong-Tai, ZHU Hai-Dong and LU Zhao-Hui. Isotope Ratios of Light Charged Particles and Temperature in the Reactions 30MeV/u40Ar+112,124Sn[J]. Chinese Physics C, 2001, 25(11): 1071-1076. shu
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Received: 2000-10-08
Revised: 1900-01-01
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Isotope Ratios of Light Charged Particles and Temperature in the Reactions 30MeV/u40Ar+112,124Sn

    Corresponding author: XIAO Zhi-Gang,
  • Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Abstract: Coincidence measurements between residues and light charged particles (LCPs) have been made for the reactions 30MeV/u 40Ar+112,124Sn. The LCPs were measured by 11 semi-conduct telescopes from very forward angle to backward angle. The times of flight of the residues were measured by PPACs installed concentrically around the beam at forward angle. The excitation energy of the primary hot nuclei was obtained from the velocity of residues in the frame of incomplete fusion model. The single isotope ratios, as function of observing angle and excitation energy have been studied. The ratio of 3He/4He and 6Li/7Li increases with angle while that of 6He/4He and 8Li/7Li decreases. The calculation of statistical theory can not reproduce the curve quantitatively, implying the existence of dynamic effect. Isospin effect of the primary hot nuclei on the single isotopic ratios is demonstrated. However, the temperature extracted from double isotope ratios is target independent.

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