Local density change of a metal backing due to implanted ions: Effect on nuclear lifetimes obtained with the DSA method

Abstract

Density changes in the Ne and Al implanted regions of the bcc metals Mo and Ta have been studied with the Doppler Shift Attenuation (DSA) method through the (p, γ) reaction. Evidence for the increase of the local density is observed. Using the new experimental method, the dependence of the local density change on the implanted dose was studied from concentrations of few at.% up to saturation values, 26 at.% for Ne in Mo and 100 at.% for Al in Mo and Ta. Effects of the local density changes on the nuclear lifetimes obtained with the DSA method are discussed.