LOW-TEMPERATURE LUMINESCENCE OF LIB3O5 GLASS WITH A HUMAN BODY TISSUE-EQUIVALENT EFFECTIVE ATOMIC NUMBER

A study of the low-temperature (8.6 K) luminescence of undoped LiB3O5 glass under excitation by synchrotron radiation (22.2 eV and 7.1 eV) was carried out.A comparative analysis of the obtained results was carried out with the results of studies of the low-temperature luminescence of undoped LiB3O5 single crystals published by other authors.As a result, a mechanism for the emission of undoped LiB3O5 glass at low temperatures was proposed, which is associated with the formation of unrelaxed molecular-type excitons, their migration, followed by the formation of autolocalized excitons near point defects, and with the corresponding their annihilation.