Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of <SUP>40</SUP>Ar＋<SUP>197</SUP>Au at 25MeV/u

Wu Heyu; Jin Genming; Li Zuyu; Dai Guangxi; Qi Yujin; Luo Qingzheng; He Zhiyong; Duan Limin; Zhang Baoguo; Dang Bingrong; Wen Wanxin

Chinese Physics C> 1995, Vol. 19> Issue(7) : 591-597

Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

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Abstract：
For the reaction of 25MeV/u ⁴⁰Ar with ¹⁹⁷Au, coincidence measurements have been made for the heavy residue fission fragments and light charged particles (Z≤2). The folding-angle and time of flight of heavy residue fission fragments were used to deduce the linear momentum transfer (LMT). The initial properties of these nuclei, excitation energies, angular momenta and temperatures, have been studied by measurements of LMT and light particle spectra. The relation between the excitation energy per nucleon and temperature is analysed by different windows of LMT. It is shown that the hot nuclei are close to saturation of temperature for central collision and close to "phase transition for multifragmentation".

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[1]	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.
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[8]	Zheng Jiwen , Wu Enjiu , Xiao Zhigang , Zhang Chun , Yin Shuzhi , Wang Sufang , Jin Genming , Tan Jilian , Jin Weiyang , Song Mingtao , Li Zuyu , Wu Heyu , He Zhiyong , Yin Xu , Peng Xinping , Jiang Dongxing , Qian Xing . Investigation of Fission Properties in the Reaction 25MeV/u ⁴⁰Ar+²⁰⁹Bi. Chinese Physics C, 1999, 23(5): 409-416.
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Wu Heyu, Jin Genming, Li Zuyu, Dai Guangxi, Qi Yujin, Luo Qingzheng, He Zhiyong, Duan Limin, Zhang Baoguo, Dang Bingrong and Wen Wanxin. Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u[J]. Chinese Physics C, 1995, 19(7): 591-597.

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

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u

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: 1995-07-05

Abstract: For the reaction of 25MeV/u ⁴⁰Ar with ¹⁹⁷Au, coincidence measurements have been made for the heavy residue fission fragments and light charged particles (Z≤2). The folding-angle and time of flight of heavy residue fission fragments were used to deduce the linear momentum transfer (LMT). The initial properties of these nuclei, excitation energies, angular momenta and temperatures, have been studied by measurements of LMT and light particle spectra. The relation between the excitation energy per nucleon and temperature is analysed by different windows of LMT. It is shown that the hot nuclei are close to saturation of temperature for central collision and close to "phase transition for multifragmentation".

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Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u

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Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u

Corresponding author: Wu Heyu,

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Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of 40Ar＋197Au at 25MeV/u

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通讯作者: 陈斌, bchen63@163.com

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Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of 40Ar＋197Au at 25MeV/u

Corresponding author: Wu Heyu,

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Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u

Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of ⁴⁰Ar＋¹⁹⁷Au at 25MeV/u