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

Relation Between Temperature and Excitation Energy of Hot Nuclei in the Reaction of⁴⁰Ar＋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".

References

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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 of⁴⁰Ar＋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/u⁴⁰Ar with¹⁹⁷Au, 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 of⁴⁰Ar＋¹⁹⁷Au at 25MeV/u

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通讯作者:陈斌, bchen63@163.com

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