Low-temperature luminescence of LiB$_3$O$_5$ 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 bysynchrotron radiation (22.2 eV and 7.1 eV) was carried out. A comparative analysis of the obtained results wascarried out with the results of studies of the low-temperature luminescence of undoped LiB3O5 single crystalspublished by other authors. As a result, a mechanism for the emission of undoped LiB3O5 glass at lowtemperatures 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 thecorresponding their annihilation