Long-Lived Luminescence in Anthracene Crystals Excited by Both β Ray and Visible Light

Kohei Yokoi, Yujiro Ohba

Research output: Contribution to journalArticle


A new luminescence component was observed when anthracene crystals were excited by visible light under β-ray irradiation. It originates from the light-excitation of some excited state generated by β-ray irradiation. Though the spectrum agrees with that of fluorescence and the lifetime is about 7 ms, it is not the normal delayed fluorescence resulting from triplet-triplet annihilation. A remarkable difference from the luminescence which has ever been observed is the existence of a threshold in the intensity of excitation light.

Original languageEnglish
Pages (from-to)1693-1696
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number5
Publication statusPublished - 1985 Jan 1


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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