Ab initio DFT+U study of He atom incorporation into UO2 crystals
Abstract
We present and discuss results of the density functional theory (DFT) for perfect UO2 crystals with He atoms in octahedral interstitial positions therein. We have calculated basic bulk crystal properties and He incorporation energies into the low temperature anti-ferromagnetic UO2 phase using several exchange–correlation functionals within the spin-polarized local density (