The positron lifetimes of some compounds with NaCl-type crystal structure are calculated with the method of atomic superposition approximation （ATSUP） based on the theories of local-density-approximation （LDA） and...The positron lifetimes of some compounds with NaCl-type crystal structure are calculated with the method of atomic superposition approximation （ATSUP） based on the theories of local-density-approximation （LDA） and general- gradient-approximation （GGA）. The systematical results are fitted to a curve as a function of lattice constants. The positron bulk lifetimes of some other compounds with NaCl-type crystal structure, which are deduced from the systematical results, are in agreement with the experimental results given in other literature.展开更多
作者采用材料物理化学的理论观点和方法,研究了 NaCl(OH-)色心晶体的赋色、热处理过程条件与状态的关系,确立了较适宜的赋色、热处理条件,获得了较纯净的浓度较高的 F 心和O^(2-)-F^+。经后续处理得到了较高浓度的(F_2^+)_H 心,在国内...作者采用材料物理化学的理论观点和方法,研究了 NaCl(OH-)色心晶体的赋色、热处理过程条件与状态的关系,确立了较适宜的赋色、热处理条件,获得了较纯净的浓度较高的 F 心和O^(2-)-F^+。经后续处理得到了较高浓度的(F_2^+)_H 心,在国内首次成功地实现 NaCl(OH^-):(F_2^+)_H色心激光运转。展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 10675114 and 10835006)the Important Direction Project of the Chinese Academy of Sciences
文摘The positron lifetimes of some compounds with NaCl-type crystal structure are calculated with the method of atomic superposition approximation （ATSUP） based on the theories of local-density-approximation （LDA） and general- gradient-approximation （GGA）. The systematical results are fitted to a curve as a function of lattice constants. The positron bulk lifetimes of some other compounds with NaCl-type crystal structure, which are deduced from the systematical results, are in agreement with the experimental results given in other literature.
