Production of Vacancies by Laser Bombardment

Abstract

Vacancy concentrations estimated to be as large as 1 at. % have been induced in pure nickel and vanadium foils by bombardment with high‐intensity laser pulses. Annealing bombarded foils at temperatures greater than 0. 3T_m (absolute melting point) allows vacancies to form into aggregates. Examples are shown of voids in nickel and faulted loops in vanadium. Possible mechanisms of vacancy generation are discussed.