https://doi.org/10.1351/goldbook.T06384
Technique allowing the quantitative and qualitative detection of radiation-induced changes in the real, \(\Delta \rm{Re}\sigma\), and imaginary, \(\Delta \rm{Im}\sigma\), components of the conductivity of a medium by time-resolved measurement of changes in the microwave absorption resulting from the formation of mobile charges or from changes in the dipole moment or polarizability of molecules on excitation.
Note: From \(\Delta \rm{Re}\sigma\) (corresponding to a change in the dielectric loss, \(\Delta \varepsilon''\)) the product of the yield and the mobility of charges carriers or the dipole moment change can be determined. From \(\Delta \rm{Im}\sigma\) (corresponding to a change in the relative permittivity, \(\Delta \varepsilon'\)) the product of the yield and the change in molecular polarizability can be determined.