Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210

LIU Jian-Feng; JIA Min; ZHAO Wei-Juan

Chinese Physics C> 2003, Vol. 27> Issue(5) : 430-435

Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210

Department of Physics,Zhengzhou University,Zhengzhou 450052,China

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Abstract：
The subjects related to the giant dipole resonance model for the γ production mechanisms induced by fast neutrons have been studied in the nuclear mass region 180≤A≤210.It contains the difference between the γ-ray strength functions of the cascad γ deexcitation processes in the (n,γ)and (n,n′γ)reactions as well as the variation tendency of the reaction cross section ratios between the direct-semidirect radiative captures and the compound nucleus statistical processes with the incident energies, nuclear mass numbers and the nuclear shells. The numerical calculations and the comparisons with the experimental values for ¹⁸¹Ta,Au and ²⁰⁸Pb have been done in the nentron incident energy region from 1 MeV to 20MeV. The analyses and discussions to the results have also been given.

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LIU Jian-Feng, JIA Min and ZHAO Wei-Juan. Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210[J]. Chinese Physics C, 2003, 27(5): 430-435.

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Received: 2002-11-08
Revised: 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

Study on the Giant Dipole Resonance Model for γ Production Mechanisms Induced by Fast Nutrons in the Nuclear Mass Region 180≤A≤210

Corresponding author: LIU Jian-Feng,

Department of Physics,Zhengzhou University,Zhengzhou 450052,China

Received Date: 2002-11-08
Accepted Date: 1900-01-01
Available Online: 2003-05-05

Abstract: The subjects related to the giant dipole resonance model for the γ production mechanisms induced by fast neutrons have been studied in the nuclear mass region 180≤A≤210.It contains the difference between the γ-ray strength functions of the cascad γ deexcitation processes in the (n,γ)and (n,n′γ)reactions as well as the variation tendency of the reaction cross section ratios between the direct-semidirect radiative captures and the compound nucleus statistical processes with the incident energies, nuclear mass numbers and the nuclear shells. The numerical calculations and the comparisons with the experimental values for ¹⁸¹Ta,Au and ²⁰⁸Pb have been done in the nentron incident energy region from 1 MeV to 20MeV. The analyses and discussions to the results have also been given.