Calculation of pre-equilibrium effects in neutron-induced cross section on 65Cu

Leila Yettou

doi:10.1051/epjconf/201714612024

Abstract

Copper is one of the constituents of alloys for structural components and a dosimetry material. In this study, we calculated the proton emission spectra and the excitation function produced by (n, xp) and (n, p) reactions respectively by using the Exciton model predictions combined with the Kalbach angular distribution systematics and the Hybrid Monte-Carlo Simulation (HMS). The sensitivity studies on the input parameters from optical model, level density, spin cut-off parameter and mean free path have been investigated for our calculations with the code EMPIRE and the code TALYS. The proton emission spectra and the excitation function for 65 Cu nucleus were discussed and found in good agreement with the available experimental data.

Highlights

The calculations of proton emission spectra and of the excitation function produced by (n, x p) and (n, p) reactions are indispensable for the design of nuclear devices
The main purpose of this work is to investigate the sensitivities on the preequilibrium models and those on the input parameters from Reference Input Parameter Library (RIPL-3) [3] calculations as optical model, level density and level density a−parameter calculations of proton emission spectra and of the excitation function produced by 65Cu(n, xp) and 65Cu(n, p)65Ni reactions, respectively, using TALYS 1.8 [4] and EMPIRE 3.2 [2] codes
In the framework of exciton model at one component [5] using PCROSS of EMPIRE [2] combined with Kalbach angular distribution systematics [16], the optical model parameters of Delaroche et al have been used for neutrons [17] and for protons, the optical model parameters of Xiaohua Chonghai have been chosen [18]

Summary

Introduction

The calculations of proton emission spectra and of the excitation function produced by (n, x p) and (n, p) reactions are indispensable for the design of nuclear devices. The development of high quality nuclear data of copper is important due to its role as an important structural material in many acceleratordriven system designs. The calculations of proton emission spectra and of the excitation function produced by 63Cu(n, xp) and 63Cu(n, p)63Ni reactions [1], respectively, are used in the framework of preequilibrium models with the new version of the EMPIRE 3.2 code [2]. The main purpose of this work is to investigate the sensitivities on the preequilibrium models and those on the input parameters from Reference Input Parameter Library (RIPL-3) [3] calculations as optical model, level density and level density a−parameter calculations of proton emission spectra and of the excitation function produced by 65Cu(n, xp) and 65Cu(n, p)65Ni reactions, respectively, using TALYS 1.8 [4] and EMPIRE 3.2 [2] codes. The input parameters of spin cut-off, M2constant, M2limit and M2shift from the squared matrix element of the TALYS [4], Exact NR (nonrelativistic), Fermi gas densities, default damp rate in HMS, single particle level density g, adjustable partial level density, adjustable pairing shift for adjustment of the Fermi gas level density and mean free path have been taken in account but they affect weakly the calculations

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Results

Conclusion