Quenching Process of Radioluminescence in Anthracene Crystals

Kohei Yokoi, Yujiro Ohba

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Temperature dependences of β-ray-excited radioluminescence and uv-light-excited photoluminescence were measured in anthracene crystals. They depend on crystals, but their ratio shows the same characteristic in all of the crystals. Large temperature dependence of the ratio cannot be explained by the three relaxation processes of highly excited states, i.e. internal conversion and vibrational relaxation, autoionization (preionization) and exciton fission. It is expected by analyzing the data that there must exist a radiationless decay with an activation energy 0.048 eV in the relaxation manifolds. Predissociation to a geminate radical pair, which is followed by radiationless geminate recombination to an anthracene molecule or fission to isolated radicals, is considered as a competing process with the above three physical processes.

Original languageEnglish
Pages (from-to)1634-1641
Number of pages8
JournalJournal of the Physical Society of Japan
Issue number4
Publication statusPublished - 1985

ASJC Scopus subject areas

  • General Physics and Astronomy


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