Evolution from Cascade Fission to Prompt Multifragmentation with Increasing Excitation Energy

Wu Heyu; Dai Guangxi; He Zhiyong; Qi Yujin; Li Zuyu; Jin Genming; Luo Qingzheng; Duan Limin; Wen Wanxin; Zhang Baoguo

Chinese Physics C> 1995, Vol. 19> Issue(8) : 739-747

Evolution from Cascade Fission to Prompt Multifragmentation with Increasing Excitation Energy

Institute of Modern Physics, The Chinese Academy of Sciences,Lanzhou 730000

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Abstract：
The correlation functions of relative angle distributions of mass-symmetric ternary fissions in the reactions Ar+Au、Bi、Tb at 25MeV/u are presented.The evolution of decay mode of hot nucleus is studied by comparing the present data with Ar+ An(60MeV/u)experimental results.It is shown that the time scale for fragment emission is reduced from the characteristic timeτ=1000fm/c at 25MeV/ufor standard sequential decay to prompt emission one at 60 MeV/u withτ=50 fm/c.

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Wu Heyu, Dai Guangxi, He Zhiyong, Qi Yujin, Li Zuyu, Jin Genming, Luo Qingzheng, Duan Limin, Wen Wanxin and Zhang Baoguo. Evolution from Cascade Fission to Prompt Multifragmentation with Increasing Excitation Energy[J]. Chinese Physics C, 1995, 19(8): 739-747.

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Evolution from Cascade Fission to Prompt Multifragmentation with Increasing Excitation Energy

Corresponding author: Wu Heyu,

Institute of Modern Physics, The Chinese Academy of Sciences,Lanzhou 730000

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1995-08-05

Abstract: The correlation functions of relative angle distributions of mass-symmetric ternary fissions in the reactions Ar+Au、Bi、Tb at 25MeV/u are presented.The evolution of decay mode of hot nucleus is studied by comparing the present data with Ar+ An(60MeV/u)experimental results.It is shown that the time scale for fragment emission is reduced from the characteristic timeτ=1000fm/c at 25MeV/ufor standard sequential decay to prompt emission one at 60 MeV/u withτ=50 fm/c.