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Measurement of subnanosecond scintillation decay times by time-correlated single photon counting

Authors
Journal
International Journal of Radiation Applications and Instrumentation Part C Radiation Physics and Chemistry
1359-0197
Publisher
Elsevier
Publication Date
Volume
32
Issue
2
Identifiers
DOI: 10.1016/1359-0197(88)90196-8
Disciplines
  • Physics

Abstract

Abstract A time-correlated single photon counting system for measuring scintillation decay times is described in which the system time response function has a FWHM less than 220 ps. This is a two-scintillator system in which a time-to-amplitude converter (TAC) is started by gamma-induced flashes from a bright 500-ps FWHM scintillator closely coupled to a 14-stage photomultiplier. The TAC is stopped by single-photon pulses from an amplified high-gain microchannel-plate photomultiplier viewing the sample. A 60Co source is sandwiched between the start scintillator and the sample to be measured. The time correlation depends on the coincident excitation of both scintillators by the two γ rays from each nuclear disintegration.

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