论文信息 - SCINTILLATION PULSE SHAPES OF ANTHRACENE SINGLE CRYSTALS IN NANOSECOND REGION. II. DIFFERENCE BETWEEN SCINTILLATION AND FLUORESCENCE PULSES.

SCINTILLATION PULSE SHAPES OF ANTHRACENE SINGLE CRYSTALS IN NANOSECOND REGION. II. DIFFERENCE BETWEEN SCINTILLATION AND FLUORESCENCE PULSES.

The accurate pulse shapes of luminescence of anthracene single crystal in the time region of about 50 nsec from the rise-portion of pulse excited by UV light pulse, α-, β-particle and γ-ray were obtained. The pure decay constants of scintillation excited by high energy radiation, and of fluorescence by UV light pulse were determined to be (10±1) nsec and (6.5±0.5) nsec respectively without the self-absorption effect. The differences of decay constants and rise times between scintillation and fluorescence pulses were discussed on the basis of the fact that the life time of ions generated in anthracene crystal by high energy radiation is longer than that of the lowest singlet excitons.

M. Kawanishi | S. Owaki | Y. Kimura

[1] A. Matsui,et al. Decay Times of Emissions and Diffusions of Singlet Excitons in Anthracene Crystals , 1968 .

[2] I. Munro,et al. Instrumental response time corrections in fluorescence decay measurements. , 1968, Journal of scientific instruments.

[3] R. Kepler. Photoionization of Excitons in Anthracene , 1967 .

[4] J. Jortner,et al. Collision Ionization of Singlet Excitons in Molecular Crystals , 1967 .

[5] W. H. Wright. Variations in the Efficiency of Fluorescence Excitation in Anthracene , 1966 .

[6] W. Ware,et al. Lifetime and Quenching of Anthracene Fluorescence in the Vapor Phase , 1965 .

[7] I. Nakada. The Optical Absorption of Anthracene Crystal near 4000 A , 1965 .

[8] J. Birks,et al. The Photoluminescence Decay of Organic Crystals , 1962 .

[9] J. Birks. The Fluorescence and Scintillation Decay Times of Crystalline Anthracene , 1962 .

[10] G. Brucker,et al. Decay Times of Fluorescent Substances Excited by High-Energy Radiation , 1957 .

[11] G. Wright. Fluorescence Excitation Spectra and Quantum Efficiencies of Organic Crystals , 1955 .

[12] K. Sugihara,et al. Scintillation Pulse Shapes of Anthracene Single Crystals in Nanosecond Region. I. Initial Spikes in α-Scintillation Pulse , 1970 .