Temperatures and Excitation Energies of Hot Nuclei in the Reactions of 40Ar+natAg, 209Bi at 25 MeV/u

Yin Shuzhi; Jin Weiyang; Zhang Chun; Jin Genming; Zheng Jiwen; Wu Enjiu; Tan Jilian; Li Zuyu; Wang Sufang; Song Mingtao; Wu Heye; He Zhiyong; Jiang Dongxing; Qian Xing

Chinese Physics C> 1997, Vol. 21> Issue(S3) : 29-34

Temperatures and Excitation Energies of Hot Nuclei in the Reactions of ⁴⁰Ar+^natAg, ²⁰⁹Bi at 25 MeV/u

Yin Shuzhi ¹ ,
Jin Weiyang ¹ ,
Zhang Chun ¹ ,
Jin Genming ¹ ,
Zheng Jiwen ¹ ,
Wu Enjiu ¹ ,
Tan Jilian ¹ ,
Li Zuyu ¹ ,
Wang Sufang ¹ ,
Song Mingtao ¹ ,
Wu Heye ¹ ,
He Zhiyong ¹ ,
Jiang Dongxing ² ,
Qian Xing ²

1. Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou, China;
2. Department of Technical Physics, Beijing University

Abstract
HTML
Reference
Related

PDF

Abstract：
Coincidence measurements of fission fragments and light-charged particles have been performed for the reactions of ⁴⁰Ar+^natAg, ²⁰⁹Bi at E/A=25 MeV using 4 PPAC and 11 sets of △E-E telescopes. Angular correlations of fission fragments are plotted as a function of the folding angle between the two detected fission fragments. The linear momentum transfer distributions are derived by measured angular correlation. The backward spectra of light particles detected in coincidence with fission fragments having different average <LMT> are analyzed with a Maxwell distribution. After some corrections the initial temperature of the hot nuclei is determined from the energy spectra. The excitation energies corresponding to the different average <LMT> are obtained considering the reaction Q values and pre-equilibration emission. In the central collision of the ⁴⁰Ar+^natAg, ²⁰⁹Bi reactions, excitation energies are measured to be about 4.2 MeV/u, 2.4 MeV/u and temperatures about 6.1 MeV, 5.5 MeV, respectively. In a semi-central collision, the measured excitation energies and temperatures are about 3.5 MeV/u, 1.9 MeV/u, and 5.8 MeV, 4.8 MeY, respectively.
- hot nuclei ,
- nuclear temperature ,
- excitation energy

[1]	Guofeng Qu , Yu Huang , Hua Zheng , Xingquan Liu , R. Wada , Weiping Lin , Meirong Huang , Jifeng Han , Peipei Ren , Zhenlei Yang , Xin Zhang , Qiangzhong Leng . Determining the nuclear temperature dependence on source neutron-proton asymmetry in heavy-ion reactions at intermediate energy. Chinese Physics C, 2023, 47(5): 054002. doi: 10.1088/1674-1137/acbd91
[2]	Peng-Cheng Li , Hong-Fei Zhang , Yong-Jia Wang . Stability of super heavy nuclei associated with the updated nuclear data. Chinese Physics C, 2017, 41(11): 114103. doi: 10.1088/1674-1137/41/11/114103
[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]	Jun-Long Tian , Hai-Tao Cui , Teng Gao , Ning Wang . Effect of Wigner energy on the symmetry energy coefficient in nuclei. Chinese Physics C, 2016, 40(9): 094101. doi: 10.1088/1674-1137/40/9/094101
[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]	LIU Bei-Bei , OUYANG Fei , CHEN Wei . Influence of coupling constants on nuclear symmetry energy. Chinese Physics C, 2013, 37(4): 044103. doi: 10.1088/1674-1137/37/4/044103
[7]	HAN Yi-Wen , BAO Zhi-Qing , HONG Yun . Unruh-Verlinde temperature and energy of (2+1)-dimensional matter coupled black hole via entropic force. Chinese Physics C, 2011, 35(7): 612-615. doi: 10.1088/1674-1137/35/7/003
[8]	WEI Su-Min , ZHANG Tian-Jue , AN Shi-Zhong , BI Yuan-Jie . Study of energy deposition and stripper temperature for CYCIAE-100. Chinese Physics C, 2009, 33(S2): 50-52. doi: 10.1088/1674-1137/33/S2/013
[9]	YE Wei . Surveying the role of excitation energy in probing nuclear dissipation. Chinese Physics C, 2009, 33(7): 528-531. doi: 10.1088/1674-1137/33/7/005
[10]	YE Yan-Lin , ZHOU Xiao-Hong , LIU Wei-Ping , MA Yu-Gang , ZHANG Yu-Hu , XU Fu-Rong . Outline of the progress in the study of radioactive nuclear physics and super-heavy nuclei. Chinese Physics C, 2008, 32(S2): 1-7.
[11]	DUAN Li-Min , WU He-Yu , JIN Gen-Ming , WANG Su-Fang , LI Zu-Yu , WEI Zhi-Yong , ZHANG Bao-Guo , WANG Hong-Wei , XIAO Zhi-Gang , LIU Yong-Ying , HU Pei-Gang , LU Zhao-Hui , TIAN Wen-Dong , GOU Quan-Bu . Excitation Energy and Temperature of Compound Nuclei in the Reaction of 35MeV/u ⁴⁰Ar+¹⁹⁷Au. Chinese Physics C, 2003, 27(2): 118-123.
[12]	Duan Limin , Wang Sufang , Zhang Baoguo , Wen Wanxin , Jin Genming , Zheng Jiwen , He Zhiyong , Li Zuyu , Tan Jilian , Xiao Zhigang , Wang Hongwei , WU Heyu . Excitation Energy and Temperature of Hot Nucleiin the Reaction of 25 MeV/u ⁴⁰Ar+⁹³Nb. Chinese Physics C, 1998, 22(9): 780-786.
[13]	Wei Zhiyong , Zhu Yongtai . Influence of IMF Internal Excitation on the Extraction of the Isotope Nuclear Temperature. Chinese Physics C, 1997, 21(S3): 57-62.
[14]	Pan Feng , Dai Lianrong . Magnetic Moments of Odd a Nuclei in q-Deformed Nuclear Shell Model. Chinese Physics C, 1996, 20(S2): 197-204.
[15]	Dai Guangxi , Wu Heyu , Duan Limin , Li Zuyu , He Zhiyong , Luo Qingzheng , Zhang Baoguo . Threefold Fragmentation in Hot.Nuclei with Medium Masses. Chinese Physics C, 1996, 20(S3): 233-241.
[16]	Wu Heyu , Jin Genming , Li Zuyu , Dai Guangxi , Qi Yujin , Luo Qingzheng , He Zhiyong , Duan Limin , Zhang Baoguo , Dang Bingrong , Wen Wanxin . Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u. Chinese Physics C, 1995, 19(7): 591-597.
[17]	EMU01 Collaboration . Relative Information Entropy of Particle Production in High-Energy Induced Nuclear Reactions. Chinese Physics C, 1994, 18(Z1): 61-68.
[18]	Zuo Wei , Ge Lingxiao , Zhang Fengshou . Dynamics of Heavy Ion Collisions in the Fermi Domain (III) Multifragmentation and Limiting Excitation Energy. Chinese Physics C, 1993, 17(S3): 277-283.
[19]	Liu Yuxin , Long Guilin , Sun Hongzhou . The Staggering Phenomenon in the Nuclear Energy Spectrum and the Quadruple Interaction. Chinese Physics C, 1991, 15(S2): 189-195.
[20]	Sa Benhao , Zheng Yuming , Zhang Xiaoze , Lu Zhaoqi , Xu Shuyan , D. H. E. Gross . Behaviors of the Phase Transition Exhibited in the Disassembly of Hot, Dilute and Finite Nuclei. Chinese Physics C, 1989, 13(S1): 53-58.

Access

Get Citation

Yin Shuzhi, Jin Weiyang, Zhang Chun, Jin Genming, Zheng Jiwen, Wu Enjiu, Tan Jilian, Li Zuyu, Wang Sufang, Song Mingtao, Wu Heye, He Zhiyong, Jiang Dongxing and Qian Xing. Temperatures and Excitation Energies of Hot Nuclei in the Reactions of ⁴⁰Ar+^natAg, ²⁰⁹Bi at 25 MeV/u[J]. Chinese Physics C, 1997, 21(S3): 29-34.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1996-08-20

Fund

Supported by the National Natural Science Foundation of China.

Article Metric

Article Views(856)
PDF Downloads(4)
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

Temperatures and Excitation Energies of Hot Nuclei in the Reactions of ⁴⁰Ar+^natAg, ²⁰⁹Bi at 25 MeV/u

1. Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou, China;

2. Department of Technical Physics, Beijing University

Received Date: 1996-08-20

Fund Project: Supported by the National Natural Science Foundation of China.

Abstract: Coincidence measurements of fission fragments and light-charged particles have been performed for the reactions of ⁴⁰Ar+^natAg, ²⁰⁹Bi at E/A=25 MeV using 4 PPAC and 11 sets of △E-E telescopes. Angular correlations of fission fragments are plotted as a function of the folding angle between the two detected fission fragments. The linear momentum transfer distributions are derived by measured angular correlation. The backward spectra of light particles detected in coincidence with fission fragments having different average <LMT> are analyzed with a Maxwell distribution. After some corrections the initial temperature of the hot nuclei is determined from the energy spectra. The excitation energies corresponding to the different average <LMT> are obtained considering the reaction Q values and pre-equilibration emission. In the central collision of the ⁴⁰Ar+^natAg, ²⁰⁹Bi reactions, excitation energies are measured to be about 4.2 MeV/u, 2.4 MeV/u and temperatures about 6.1 MeV, 5.5 MeV, respectively. In a semi-central collision, the measured excitation energies and temperatures are about 3.5 MeV/u, 1.9 MeV/u, and 5.8 MeV, 4.8 MeY, respectively.

Temperatures and Excitation Energies of Hot Nuclei in the Reactions of ⁴⁰Ar+^natAg, ²⁰⁹Bi at 25 MeV/u

Abstract：

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

Temperatures and Excitation Energies of Hot Nuclei in the Reactions of ⁴⁰Ar+^natAg, ²⁰⁹Bi at 25 MeV/u

HTML

目录