Mossbauer spectroscopy and electron-positron annihilation in reactor pressure vessel material study

摘要

The most significant advantage of Mossbauer spectroscopy with regard to the investigationof steels is its very high sensitivity to changes in the atomic configuration of resonant atoms in the immediate neighbourhood of an interstitial atom.Mossbauer spectroscopy,via the hyperfine interactiohns,provides us with information on the magnetic stage,electrical interaction,chemical bonding,local crystal symmetry,lattice defects,dynamic parameters,elastic streeses,etc.This method was rarely used in the nuclear power industry till now.