Threefold Fragmentation in Hot.Nuclei with Medium Masses

Dai Guangxi; Wu Heyu; Duan Limin; Li Zuyu; He Zhiyong; Luo Qingzheng; Zhang Baoguo

Chinese Physics C> 1996, Vol. 20> Issue(S3) : 233-241

Threefold Fragmentation in Hot.Nuclei with Medium Masses

Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou, China

Abstract
HTML
Reference
Related

PDF

Abstract：
The threefold massive fragment in hot nuclei with medium mass number has been measured in ⁴⁰Ar+¹¹⁵In, ¹⁰³Rh, and ⁹³Nb reactions at 25MeV/u. The fragments emitted at angles larger than 32° are detected by ten parallel plate position-sensitive avalanche counters (PPAC), each with an area of 25×20cm². The total kinetic energies (TKE),the yield ratio P³² of the threefold fragmentation to Hssion,and the distributions of the fragment mass, velocity, and relative angle,etc., are obtained. From the mass ratio of the fragments, a simple empirical expression is deduced. By analyzing their angular correlation function with a simple space-time model, the time difference between two scission points in the threefold process in the Ar+In reaction system is derived. A systematics of P³² versus Z²/A for hot nuclei is observed.
- hot nucleus ,
- threefold fragmentation ,
- angular correlation function ,
- clusterization of nuclear matter ,
- time differences between two scissions

[1]	Li-Hua Song , Lin-Wan Yan , Shang-Fei Xin . The study of gluon energy loss in cold nuclear matter from J/ψ production. Chinese Physics C, 2018, 42(12): 124103. doi: 10.1088/1674-1137/42/12/124103
[2]	Xiangrui Gao , Yu Jia , Liuji Li , Xiaonu Xiong . Relativistic correction to gluon fragmentation function into pseudoscalar quarkonium. Chinese Physics C, 2017, 41(2): 023103. doi: 10.1088/1674-1137/41/2/023103
[3]	Harpreet Singh , Arvind Kumar , Harleen Dahiya . Magnetic moments of octet baryons in hot and dense nuclear matter. Chinese Physics C, 2017, 41(9): 094104. doi: 10.1088/1674-1137/41/9/094104
[4]	ANG Pei , ZUO Wei . Three-body force effect on the properties of nuclear matter underthe gap and continuous choices within the BHF approach. Chinese Physics C, 2014, 38(8): 084102. doi: 10.1088/1674-1137/38/8/084102
[5]	SONG Li-Hua , MIAO Wen-Dan , DUAN Chun-Gui . Energy loss of charm quarks from J/ψ production incold nuclear matter. Chinese Physics C, 2014, 38(12): 124103. doi: 10.1088/1674-1137/38/12/124103
[6]	XU Xiao-Ming , ZHOU Jie . Nuclear modification factor for J/ψ production in nucleus-nucleus collisions. Chinese Physics C, 2011, 35(5): 463-466. doi: 10.1088/1674-1137/35/5/011
[7]	WANG Meng-Liang , ZHOU Dai-Cui . Medium modified fragmentation function: equivalence of the ACSX and QW formalisms in the high-Q² region. Chinese Physics C, 2011, 35(10): 935-939. doi: 10.1088/1674-1137/35/10/009
[8]	CAO Li-Gang . Superfluid nuclear matter in BCS theory and beyond. Chinese Physics C, 2009, 33(S1): 33-36. doi: 10.1088/1674-1137/33/S1/011
[9]	YAO Hai-Bo , WU Shi-Shu . Study of various charged ρ-meson masses in asymmetric nuclear matter. Chinese Physics C, 2009, 33(10): 842-847. doi: 10.1088/1674-1137/33/10/005
[10]	WANG Hong-Min , HOU Zhao-Yu , SUN Xian-Jing . Cold nuclear matter effects on J/ψ production in d-Au collisions. Chinese Physics C, 2008, 32(11): 892-896. doi: 10.1088/1674-1137/32/11/009
[11]	ZUO Wei . Single particle properties in asymmetric nuclear matter and TBF rearrangement effect. Chinese Physics C, 2008, 32(S2): 64-69.
[12]	CUI Chang-Xi , ZUO Wei . Superfluidity in neutron matter and symmetric nuclear matter and the effect of a microscopic three-body force. Chinese Physics C, 2008, 32(S2): 73-76.
[13]	YE Wei , WU Feng . Influence of angular momentum on evaporation residue cross section as a probe of nuclear dissipation. Chinese Physics C, 2008, 32(6): 433-436. doi: 10.1088/1674-1137/32/6/004
[14]	LI Xi-Guo , LI Yong-Qing . Study on effective masses of meson in dense nuclear matter. Chinese Physics C, 2008, 32(S2): 32-33.
[15]	SA Ben-Hao , WANG Zhong-Qi , SU Zong-Di , LU Zhong-Dao , ZHOU Dai-Mei . Φ Meson Production and String Fragmentation Function in Relativistic Nucleus-Nucleus Collisions. Chinese Physics C, 2003, 27(2): 147-149.
[16]	Xing Yongzhong , Xu Gongou . On Ground-State Correlation in Nuclear Many-Body Systems. Chinese Physics C, 1997, 21(S4): 79-86.
[17]	Dai Guangxi , Wu Heyu , Duan Limin , Li Zuyu , He Zhiyong , Luo Qingzheng , Zhang Baoguo . The Threefold Fragmentation of Hot Nuclei With Medium Mass Number. Chinese Physics C, 1996, 20(7): 588-595.
[18]	Hou Boyu , Shi Kangjie , Yue Ruihong . The Crossing Matrices and Correlation Function of SU_K(2) Wess-Zumino-Witten Model with Fractional Level. Chinese Physics C, 1992, 16(S2): 163-172.
[19]	He Zejun , Zhang Jiaju , Li Panlin , Qiu Xijun . A Study of the Dilepton Mass Spectrum of an Expanding Hot Quark Matter. Chinese Physics C, 1991, 15(S3): 307-315.
[20]	Wang Shan , Liu Yiming , Jiang Yuzhen , Chen Xiaofan , D. Keane , S. Y. Fung , S. Y. Chu . Azimuthal Correlation Function and the Nuclear Equation of State. Chinese Physics C, 1990, 14(S4): 361-366.

Access

Get Citation

Dai Guangxi, Wu Heyu, Duan Limin, Li Zuyu, He Zhiyong, Luo Qingzheng and Zhang Baoguo. Threefold Fragmentation in Hot.Nuclei with Medium Masses[J]. Chinese Physics C, 1996, 20(S3): 233-241.

Dai Guangxi, Wu Heyu, Duan Limin, Li Zuyu, He Zhiyong, Luo Qingzheng and Zhang Baoguo. Threefold Fragmentation in Hot.Nuclei with Medium Masses[J]. Chinese Physics C, 1996, 20(S3): 233-241. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1995-06-15

Fund

Supported by the National Natural Science Foundation of China and the Director Foundation of IMP, the Chinese Academy of Sciences.

Article Metric

Article Views(956)
PDF Downloads(3)
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

Threefold Fragmentation in Hot.Nuclei with Medium Masses

Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou, China

Received Date: 1995-06-15

Fund Project: Supported by the National Natural Science Foundation of China and the Director Foundation of IMP, the Chinese Academy of Sciences.

Abstract: The threefold massive fragment in hot nuclei with medium mass number has been measured in ⁴⁰Ar+¹¹⁵In, ¹⁰³Rh, and ⁹³Nb reactions at 25MeV/u. The fragments emitted at angles larger than 32° are detected by ten parallel plate position-sensitive avalanche counters (PPAC), each with an area of 25×20cm². The total kinetic energies (TKE),the yield ratio P³² of the threefold fragmentation to Hssion,and the distributions of the fragment mass, velocity, and relative angle,etc., are obtained. From the mass ratio of the fragments, a simple empirical expression is deduced. By analyzing their angular correlation function with a simple space-time model, the time difference between two scission points in the threefold process in the Ar+In reaction system is derived. A systematics of P³² versus Z²/A for hot nuclei is observed.