Abstract
A comparative analysis of a fast atom beam and ion beam effect on a metal target in the binary collision model is performed. Irradiation by fast atoms has been shown to more closely correspond to neutron radiation in a nuclear reactor, in terms of the primary knocked-on atom spectrum and the efficiency and mechanism of the radiation defect formation. It was found that upon irradiation by fast carbon atoms with an energy of 0.2-0.3 MeV, the average number of radiation defects in the displacement cascade of one atom is four to five times higher than the calculated values using the SRIM program for ions with the same energy. It is shown that during penetration in the target, the probability of ionization of atoms with energies less than 0.4 MeV is negligible.
Highlights
Charged-particle beams are widely used in various technological processes and in the study of samples from structural materials. ermal quenching and hammering of metal products are the oldest methods employed to improve their operational properties
Improving the technological process of quenching can be achieved by increasing the product temperature change rates and processing only the surface layer, without changing the bulk properties
Molecular dynamics (MD) modeling showed that primarily knocked-out atoms (PKA) spends more than 60% of its energy on the formation of radiation defects in the target [24]
Summary
Charged-particle beams (electrons, ions, and plasma compression flow) are widely used in various technological processes and in the study of samples from structural materials. ermal quenching (hardening) and hammering of metal products are the oldest methods employed to improve their operational properties. Improving the technological process of quenching can be achieved by increasing the product temperature change rates and processing only the surface layer, without changing the bulk properties For this purpose, laser radiation [1], electron beam [2, 3], ion beam [4], and plasma compression beam [5] are used. Formation of radiation defects by ions in metals occurs at low-angle scattering on target atoms, and more than 90% of PKA have energies less than 1 keV [20]. Simulated irradiation of structural materials with accelerated atoms can simplify and accelerate the study of activation of construction components due to beam loss in heavy-ion accelerators [21] and studies of collective effects in the absorption of accelerated particles in the target [22]. From equations (1) and (2), we obtain the energy transfer efficiency in the elastic collision of an ion with PKA that is equal to
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