Open AccessBlocking of annihilation of Frenkel pairs by He atoms
Author(s) -
N. N. Degtyarenko,
А. А. Писарев
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1686/1/012016
Subject(s) - annihilation , vacancy defect , subthreshold conduction , frenkel defect , atom (system on chip) , atomic physics , blocking (statistics) , radiation , annihilation radiation , molecular physics , condensed matter physics , physics , positron annihilation , nuclear physics , transistor , positron , quantum mechanics , statistics , mathematics , voltage , computer science , embedded system , electron
The results of DFT modelling of blocking the annihilation of Frenkel pairs at small distances between vacancy and self interstitial atom is performed in application to “subthreshold” radiation defects formation in W. It is shown that even at small distances sufficient for spontaneous annihilation of the Frenkel pair, He atoms can suppress the annihilation near the surface. In some cases an additional vacancy can appear close to the surface thus increasing the radiation damage. It is concluded that He impurities can be an additional reason for subthreshold” radiation damage.