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

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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

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[11]	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.
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[14]	Liu Lianggang , Ma Weixing , Jiang Huanqing . Particle-Hole and Delta-Hole Excitation in Nuclear Mater. Chinese Physics C, 1994, 18(S4): 391-398.
[15]	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.
[16]	Dai Guangxi . The Shape and Potential of Hot Nuclei in Symmetric Ternary Fission. Chinese Physics C, 1992, 16(S3): 305-311.
[17]	Huo Yukun , Zhang Baohui , Yuan Zhushu . Nuclear Excitation by Electron Transition and γ-Ray Laser. Chinese Physics C, 1992, 16(S3): 321-328.
[18]	Gao Yonghua , He Zhenmin , Huang Ruiwang , Peng Hong'an . The Influence of Nuclear Target on “Small” Mass Lepton Pair Production of High Energy Hadron-Nuclei Collision. Chinese Physics C, 1992, 16(S3): 281-289.
[19]	Gao Chengqun , Ning Pinzhi , Yu Shaoying , He Guozhu . The Excitation Functions of Elastic Collisions Between 4N-Nuclei. Chinese Physics C, 1989, 13(S3): 309-312.
[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.

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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.

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Received: 1996-08-20

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Supported by the National Natural Science Foundation of China.

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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

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

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