“…The techniques include Mössbauer spectroscopy, 18,19 perturbed angular correlation (PAC) analysis, 20 atom probe field-ion microscopy (APFIM), [21][22][23][24][25] channeling-enhanced microanalysis (ALCHEMI), 23,26-28 ion channeling, 29,30 x-ray diffractometry (XRD), 28,31-33 and others. [34][35][36] However, each technique has its own shortcoming.…”