The Study of Giant Dipole Resonance in Hot Nuclei in the <SUP>40</SUP>Ar+<SUP>93</SUP>Nb Reaction at 25MeV/u

Zhang Baoguo; Wang Sufang; Duan Limin; Wen Wanxin; Jin Genming; Zheng Jiwen; Li Zuyu; He Zhiyong; Xiao Zhigang; Wang Hongwei

Chinese Physics C> 1998, Vol. 22> Issue(9) : 795-802

The Study of Giant Dipole Resonance in Hot Nuclei in the ⁴⁰Ar+⁹³Nb Reaction at 25MeV/u

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

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Abstract：
Gamma rays, light charged particles and evaporation residues emitted from hot nuclei formed in the ⁴⁰Ar+⁹³Nb reaction at 25MeV/u have been measured.The initial excitation energies of the hot nuclei can be deduced from the velocity of the incomplete fusion residues by applying a massive transfer model. The integrated γ multiplicity, after bremsstrahlung substraction, is constant as a function of excitation Statistical calculations were performed by using the CASCADE code, and compared with experimental data. The main effects which can lead to the saturation of the GDR γmultiplicity at high excitation energies were discussed. The experimental data can be fitted by assuming a cutoff of γ emission from the resonance above an excitation energy of approximate 250MeV.

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Zhang Baoguo, Wang Sufang, Duan Limin, Wen Wanxin, Jin Genming, Zheng Jiwen, Li Zuyu, He Zhiyong, Xiao Zhigang and Wang Hongwei. The Study of Giant Dipole Resonance in Hot Nuclei in the ⁴⁰Ar+⁹³Nb Reaction at 25MeV/u[J]. Chinese Physics C, 1998, 22(9): 795-802.

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Received: 1900-01-01
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沈阳化工大学材料科学与工程学院沈阳 110142

The Study of Giant Dipole Resonance in Hot Nuclei in the ⁴⁰Ar+⁹³Nb Reaction at 25MeV/u

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The Study of Giant Dipole Resonance in Hot Nuclei in the ⁴⁰Ar+⁹³Nb Reaction at 25MeV/u

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The Study of Giant Dipole Resonance in Hot Nuclei in the 40Ar+93Nb Reaction at 25MeV/u

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通讯作者: 陈斌, bchen63@163.com

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The Study of Giant Dipole Resonance in Hot Nuclei in the 40Ar+93Nb Reaction at 25MeV/u

Corresponding author: Zhang Baoguo,

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The Study of Giant Dipole Resonance in Hot Nuclei in the ⁴⁰Ar+⁹³Nb Reaction at 25MeV/u

The Study of Giant Dipole Resonance in Hot Nuclei in the ⁴⁰Ar+⁹³Nb Reaction at 25MeV/u