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.

References

[1]

E.C.Pollacco et al,iPhys/i.iLett/i,146b（1984）29.[2] R.J.Charity et al.,Nucl.iPhys/i.,A476（1988）516.[3] 萨本豪，D.H.E.Gross,Nucl.iPhys/i,A437（1985）643.[4] J.P.Bondorf et al,Nucl.iPhys/i.:A443（1985）321.[5] Dai Guang xi et al,Chin.Jourl.of Nucl.iPhys/i,15（1993）101.[6] 吴和宇、戴光曦等，高能物理与核物理，15（1993）680.[7] 戴光曦，高能物理与核物理，16（1992）685.[8] 吴和宇、戴光曦，物理学报，43（1994）540.[9] 吴和宇、戴光曦，高能物理与核物理，18（1994）729.[10] 戴光曦、吴和宇等，高能物理与核物理，18增刊（1994）22.[11] 吴和宇、戴光曦等，高能物理与核物理，18增刊（1994）5.[12] 吴和宇、戴光曦等，级联出射角关联函数————一种核时钟方法，核技术，待发表。[13] M.Lourel et al.,preprint,LPC Cean 93-05.

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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.