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

Abstract
HTML
Reference
Related

PDF

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.

[1]	HUANG Xi , ZHANG Feng-Shou , FENG Zhao-Qing , JIN Gen-Ming . Critical Behavior of Multifragmentation in Finite Nuclei and Extraction of Critical Exponents. Chinese Physics C, 2006, 30(2): 123-127.
[2]	FENG Zhao-Qing , ZHANG Feng-Shou , HUANG Xi , JIN Gen-Ming , LI Wen-Fei . Isospin Effect of Multifragmentation and Critical Phenomena in Finite Nuclei. Chinese Physics C, 2005, 29(6): 577-582.
[3]	XING Yong-Zhong , LIU Jian-Ye , GUO Wen-Jun , ZUO Wei , DI Yu-Fang , LI Xi-Guo , LI Zeng-Hua . Isospin Effects on Fragmentation Process and Role of Momentum Dependent Interaction in Heavy Ion Collisions at Intermediate Energy. Chinese Physics C, 2003, 27(2): 130-134.
[4]	BAO Shang-Lian , LIU Wen-Long , WEN Chen-Lin , FAN Tie-Shuan , , . Measurement of ²⁴⁸Cm/²⁵²Cf Cf Spontaneous Prompt Fission Neutron Spectrum. Chinese Physics C, 2001, 25(4): 304-308.
[5]	CHEN Bo , LIU JianYe , ZHANG FengShou , CHEN LieWen , ZHAO Qiang , ZUO Wei . Isospin Effects on Multifragmentation of Light Mass System. Chinese Physics C, 2000, 24(3): 244-249.
[6]	YUAN ShuangGui , YANG WeiFan , XU YanBing , PAN QiangYan , HE JianJun , XIONG Bing , LI YingJun . Observation of β-Delayed Fission from ²³⁰Ac. Chinese Physics C, 2000, 24(12): 1191-1193.
[7]	Zhang Fengshou , Ge Lingxiao . A Static Theory for Nuclear Multifragmentation Ⅱ.lntermittent Pattern and Critical Behaviour. Chinese Physics C, 1997, 21(5): 445-452.
[8]	Zhang Fengshou . Energetic Protons and Cold Nuclear Multifragmentation Pattern. Chinese Physics C, 1997, 21(6): 523-529.
[9]	Zhang Fengshou , Ge Lingxiao . Static Theory for Nuclear Multifragmentation I.Phase Transition and Multifrangmentation. Chinese Physics C, 1997, 21(4): 340-347.
[10]	Li Junqing , Yuan Xiuqing , Liu Jianye , Ge Lingxiao , Liu Hang . Multifragmentation and Fluctuation of Interaction Potential. Chinese Physics C, 1996, 20(4): 332-338.
[11]	Wang Fei , Zheng Yuming , Sa Benhao , Lu Zhongdao . Fusion-Fragmentation Model and ALADIN Multifragmentation Data. Chinese Physics C, 1996, 20(7): 644-650.
[12]	Han Hongyin , Li Anli , Chen Jinhua , Huang Shengnian . Behaviour of Prompt Gamma-Ray Emission in ColdFission of ²⁵²Cf. Chinese Physics C, 1995, 19(1): 8-15.
[13]	Zhang Shaoguang , Liu Jianye . Multifragmentation in Heavy Ion Collisions. Chinese Physics C, 1994, 18(S1): 64-70.
[14]	Wu Heyu , Dai Guangxi . Ternary Fission with Cascade Fission Model. Chinese Physics C, 1994, 18(8): 730-735.
[15]	Wu Heyu , Dai Guangxi . A Test of Sequential Decay of Hot Nuclei Around 3MeV/u Excitation Energy. Chinese Physics C, 1994, 18(S1): 5-12.
[16]	SUN Zhe-Min , FENG Ren-Fa , WU Xi-Zhen , ZHU Yi-Zhong . Overshooting and Prescission Neutron Multiplicity in Nuclear Fission. Chinese Physics C, 1992, 16(6): 571-576.
[17]	WANG Hai-Qiao , CAI Xu , LIU Yong . The Intranuclear Cascade and the Target Fragmentation in High Energy hA Collisions. Chinese Physics C, 1992, 16(4): 359-363.
[18]	SUN Chang-Pu . HIGH-ORDER ADIABATIC APPROXIMATIONS FOR EVOLUTION OF DEGENERATE QUANTUM MECHANICAL SYSTEM AND NON-ABELIAN INDUCED GAUGE STRUCTURE. Chinese Physics C, 1990, 14(7): 604-613.
[19]	CAI Chong-Hai , ZHUO Yi-Zhong . CALCULATION OF MUON FINAL PROBABILITIES AFTER THE PROMPT FISSION OF MUONIC ATOM. Chinese Physics C, 1983, 7(2): 203-216.
[20]	HU JI-MIN , WANG ZHENG-SHING . THE EVAPORATION MODEL THEORY FOR THE FISSION PROMPT NEUTRON SPECTRUM OF HEAVY NUCLEI. Chinese Physics C, 1979, 3(6): 772-783.

Access

Get Citation

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.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2349)
PDF Downloads(513)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
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.