Scintillation properties and α-ray detection capabilities of thin-film plastic scintillators

Masanori Koshimizu, Takayuki Yanagida, Ryoji Kamishima, Yutaka Fujimoto, Keisuke Asai

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The photoluminescence and scintillation properties of thin-film plastic scintillators of 5–100 µm thicknesses have been analyzed. The photoluminescence and X-ray-induced radioluminescence spectra exhibited a peak at 400–450 nm, which is typical for generic plastic scintillators. As for the radioluminescence spectra, the contribution of the short-wavelength component decreased with the increase in thickness owing to the self-absorption of scintillation photons inside the scintillators themselves. The temporal profiles of scintillation exhibited a fast decay on the order of nanoseconds. The pulse-height spectra of the scintillation detectors equipped with thin-film plastic scintillators were obtained for 5.4 MeV α-rays from 241Am to evaluate the α-ray detection capabilities. Peaks were observed for thin-film plastic scintillators of 9 and 22 µm thicknesses, and their light yields were estimated to be 830 and 410 photons/MeV, respectively. The dependence of pulse height spectra on film thickness indicates that self-absorption occurs in such thin films.

Original languageEnglish
Pages (from-to)1233-1239
Number of pages7
JournalSensors and Materials
Volume31
Issue number4
DOIs
Publication statusPublished - 2019

Keywords

  • Plastic scintillator
  • Thin film
  • Α-ray

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)

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