Entrance Channel Dependence of the Correlation Function of IMFs in 36Ar+112,124Sn at 35MeV/u

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HU Rong-Jiang, XIAO Zhi-Gang, WU He-Yu, DUAN Li-Min, WANG Hong-Wei, YUAN Xiao-Hua, JIN Gen-Ming, ZHU Yong-Tai, LI Zu-Yu, WANG Su-Fang, XU Hu-Shan, ZHANG Bao-Guo, WEI Zhi-Yong, FENG Zhao-Qing and FU Fen. Entrance Channel Dependence of the Correlation Function of IMFs in 36Ar+112,124Sn at 35MeV/u[J]. Chinese Physics C, 2007, 31(4): 350-356.
HU Rong-Jiang, XIAO Zhi-Gang, WU He-Yu, DUAN Li-Min, WANG Hong-Wei, YUAN Xiao-Hua, JIN Gen-Ming, ZHU Yong-Tai, LI Zu-Yu, WANG Su-Fang, XU Hu-Shan, ZHANG Bao-Guo, WEI Zhi-Yong, FENG Zhao-Qing and FU Fen. Entrance Channel Dependence of the Correlation Function of IMFs in 36Ar+112,124Sn at 35MeV/u[J]. Chinese Physics C, 2007, 31(4): 350-356. shu
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Received: 2006-08-08
Revised: 2006-09-28
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Entrance Channel Dependence of the Correlation Function of IMFs in 36Ar+112,124Sn at 35MeV/u

    Corresponding author: HU Rong-Jiang,
  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Abstract: The reduced velocity correlation functions of the Intermediate Mass Fragments (IMFs) were measured in the reactions of 36Ar+112,124Sn at 35MeV/u. The anti-correlation at small reduced velocities is more pronounced in 36Ar+124Sn system than that in 36Ar+112Sn system. The difference of the correlation functions between the two reactions is mainly contributed by the particle pairs with high momenta. A three-body Coulomb repulsive trajectory code (MENEKA) is employed to calculate the emission time scale of IMFs for the both systems. The time scale is 150fm/c in the 36Ar+112Sn system and 120fm/c in the 36Ar+124Sn system, respectively. A calculation based on an Isospin dependence Quantum Molecular Dynamics code (IQMD) reveals that the emission time spectrum of IMFs is shifted slightly leftwards in 36Ar+124Sn compared with that in the 36Ar+112Sn system, indicating a shorter emission time scale. Correspondingly, the central density of the hot nuclei decreases faster in 36Ar+124Sn than in 36Ar+112Sn.

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