Study on γ-Ray Strength Functions and Energy Spectra in the Neutron Radiative Capture of 197Au

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LIU Jian-Feng, ZHAO Wei-Juan, WANG Feng-Ge and SU Zong-Di. Study on γ-Ray Strength Functions and Energy Spectra in the Neutron Radiative Capture of 197Au[J]. Chinese Physics C, 2001, 25(10): 994-1001.
LIU Jian-Feng, ZHAO Wei-Juan, WANG Feng-Ge and SU Zong-Di. Study on γ-Ray Strength Functions and Energy Spectra in the Neutron Radiative Capture of 197Au[J]. Chinese Physics C, 2001, 25(10): 994-1001. shu
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Received: 2000-09-22
Revised: 1900-01-01
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Study on γ-Ray Strength Functions and Energy Spectra in the Neutron Radiative Capture of 197Au

    Corresponding author: LIU Jian-Feng,
  • Department of Physics, Zhengzhou University, Zhengzhou, 450052, China2 China Institute of Atomic Energy, Beijing, 102413, China

Abstract: The aim of this paper is to explain theoretically the abnormal protuberances near and after 5.5 MeV in the gamma spectra of the (n, γ) reactions for the nulei in the regions of 110≤A≤140 and 180≤A≤210.
Supposing that in the primary and cascade gamma de-excitation processes of the compound nu- cleus, besides the giant dipole resonance model, there exist the deexcitation processes of the excited states of 6He,6Li,6Be,7Li and 7Be particle Clusters, the γ-ray strength function in which these pro- cesses are contained was constructed. The (n ,γ) reaction cross sections and the gamma energy spec- tra in the neutron incident energy region from 0.01 MeV to 3MeV for 197Au were calculated. The re- suIts are in better coincidence with the experiments. Especially for the gamma energy spectra, the abnormal protuberances near and after 5.5MeV were reproduced very well.

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