PAC Probes as Diffusion Tracers in Solids
PAC Probes as Diffusion Tracers in Solids
复制标题
PAC 探针作为固体中的扩散示踪剂
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Zacate
中科院分区：
文献类型：
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作者：
G. Collins;A. Favrot;L. Kang;E. R. Nieuwenhuis;D. Solodovnikov;Jipeng Wang;M. Zacate
Perturbed angular correlation (PAC) probe atoms have been used as tracers to study diffusion in solids. The method works for diffusion on a sublattice for which the point symmetry is noncubic and the electric field gradient (EFG) at the probe nucleus reorients in each jump. Such motion leads to relaxation of the nuclear quadrupole interaction. Precise values of the tracer jump frequency have been obtained from fits of measured PAC perturbation functions. Results obtained to date are reviewed for Cd tracer atoms in rare-earth indides such as LaIn3 that have the L12 crystal structure, for which each jump on the In-sublattice reorients the EFG by 90°. New results are presented for LaSn3 and prospects for future studies are outlined.
