Abstract
Atomic displacement and gas production cross-sections were obtained for a number of materials to calculate radiation damage and gas production rate in nuclear- and fusion reactors, and neutron spallation sources. An advanced atomistic modelling approach was applied for calculations of the number of stable displacements in materials.
Highlights
I Ed where dσi /dTi is the recoil energy distribution of primary knock-on atoms (PKA) produced in i-th nuclear reaction; ND(Ti ) is the number of stable defects produced by PKA with the kinetic energy Ti, Timax is the maximal kinetic energy of the PKA in i-th reaction; Ed is the average threshold displacement energy of material
The calculation of displacement cross-section assumes the use of nuclear models to get recoil energy distributions and the simulation of atomic collision to obtain the number of stable displacements in irradiated material
Atomic displacement cross-sections were obtained for Be, Al, Ti, V, Cr, Fe, Ni, Cu, Zr, and W to estimate the radiation damage and gas production rates in nuclear- and fusion reactors, and neutron spallation sources
Summary
The evaluation of atomic displacement and gas production cross-sections for irradiated materials is a challenge considering the modelling of nuclear reactions, the simulation of atomic interactions, and the analysis and the use of available experimental data. The report describes displacement and gas production cross-sections recently evaluated in KIT and the methods used to obtain the evaluated data. I Ed where dσi /dTi is the recoil energy distribution of primary knock-on atoms (PKA) produced in i-th nuclear reaction; ND(Ti ) is the number of stable defects produced by PKA with the kinetic energy Ti , Timax is the maximal kinetic energy of the PKA in i-th reaction; Ed is the average threshold displacement energy of material. The calculation of displacement cross-section assumes the use of nuclear models to get recoil energy distributions and the simulation of atomic collision to obtain the number of stable displacements in irradiated material
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