凝縮相中における光イオン化量子収率

凝縮相

Photoionization quantum yield is determined by the branching ratios of direct ionization and superexcitation, and of autoionization and neutral dissociation of superexcited states. Effects of the medium of these processes and the implication of the yield to early events in radiation effects in condensed phase are discussed. Experimental methods to determine the yield in condensed phase and reported data are summarized. Photoionization and superexcitation processes in organic liquids are discussed on the basis of photoelectron emission yields measured by the authors. This indicated that non-ionizing processes from superexcited exist even in the liquid phase.