Приповерхностные каскады столкновений в диоксиде плутония. Молекулярно-динамическое моделирование

Abstract

A molecular dynamics simulation of a-decay-induced near-surface cascades of collisions in 239PuO2 crystals is performed to study the process of release of Pu cations from the surface due to the cascades. The cascades were initiated at 3.74 nm under the surface and directed at the angles Ѳ∊[-30°;+45°] relative to it. As a result, the average number of Pu atoms released from a spherical 239PuO2 partiocle of 1·10-6 m radius is estimated to be 0.90 atoms/decay, in good agreement with the experiment.