Calculation of athermal recombination corrected dpa cross sections for proton, deuteron and heavy-ion irradiations using the PHITS code

Y. Chen,N. Shu,H. Zhang,W. Wang,Z. Ge,Shin-ichiro Meigo,Yosuke Iwamoto

doi:10.1051/epjconf/202023920011

Abstract

To provide the athermal recombination corrected dpa (arc-dpa) cross sections for proton, deuteron and heavy ion irradiations in the energy range from 1 MeV/u to 3 GeV/u., the defect production efficiencies for aluminium, copper and tungsten were implemented in the radiation damage model in PHITS. In general, the dpa cross section is large with increasing the number of protons of incident particle. For high-energy (around 1 GeV/u) proton and deuteron irradiation, the dpa cross section is close to that under 12C irradiation due to secondaries produced by the nuclear reaction. The ratio of arc-dpa cross section to the conventional Norgett-Robinson-Torrens dpa (NRT-dpa) cross section is around 0.2 with incident energies over 100 MeV for proton and deuteron irradiations. For the case of 12C and 48Ca, this ratio is ranged from 0.3 to 0.4 for incident beam energies below 3 GeV/u.

Highlights

The displacement damage calculation method in the Particle and Heavy Ion Transport code System (PHITS) [1] has been developed using the screened Coulomb scattering to evaluate the energy of the target Primary Knock on Atom (PKA) created by the projectile and the “secondary particles” which include all particles created from the sequential nuclear reactions [1]
For the displacement cross sections of copper under proton irradiations with the energy range between 100 MeV and 3 GeV, we found that the Norgett-Robinson-Torrens dpa (NRT-dpa) cross sections are larger than the arc-dpa cross sections by a factor of ~3 and the arc-dpa cross sections using PHITS give good agreements with the experimental data [7]
For high-energy proton or deuteron irradiation, dpa value is close to that under 12C irradiation due to secondaries produced by the nuclear reaction

Summary

Introduction

The displacement damage calculation method in the Particle and Heavy Ion Transport code System (PHITS) [1] has been developed using the screened Coulomb scattering to evaluate the energy of the target Primary Knock on Atom (PKA) created by the projectile and the “secondary particles” which include all particles created from the sequential nuclear reactions [1]. This method enables us to calculate displacement cross sections of materials for various particle such as proton, deuteron and heavy-ion in the wide energy range. We calculated the arc-dpa cross sections of the selected materials (aluminium, copper and tungsten) for proton, deuteron and heavy-ion (12C and 40Ca) irradiations in the high-energy region between 100 MeV/u and 3 GeV/u and compare them with the NRT-dpa cross sections for discussions about particle and material dependencies of the athermal recombination correction

Displacement damage calculation method with PHITS

Summary