金属的传导电子密度与正电子湮没率的关系

CONDUCTION ELECTRON DENSITY AND POSITRON ANNIHILATION RATE IN METAL

应用电荷自洽离散变分Ｘα方法（ＳＣＣ─ＤＶＭ─ＸαＭｅｔｈｏｄ）计算了金属中的传导电子密度，得出了金属的传导电子密度与正电子湮没率的关系，并由此直接给出了增强因子的形式。同时讨论了在这些金属中正电子与芯电子湮没所占比例及其对正电子湮没率的影响。

Self─consistent charge discrete variational Xα cluster method (SCC─DVM ─Xα) is used to calculate the conduction electron densities of metals. Comparing with experimental data of positron annihilation rate,a relation between electron density and positron annihilation rate,and an expression of enhancement factor were obtained. Based on this relation,the fractions of core electron annihilation are discussed..