Development of radiochromic dosimeters based on polyvinyl chloride films containing leuco crystal violet

Ichiro Kawamura, Hiroki Kawamoto, Yutaka Fujimoto, Masanori Koshimizu, Keisuke Asai

Research output: Contribution to journalArticlepeer-review

Abstract

We fabricated polyvinyl chloride (PVC) films containing leuco crystal violet (LCV) to develop a radiochromic material with high sensitivity to radiation. For comparison, polyvinyl butyral, polystyrene, and poly(methyl methacrylate) films containing LCV were additionally prepared. The absorption spectra of these films before and after X-ray irradiation were measured. The change in the absorbance of the PVC film at 600 nm was 2.9-32 times those of other films at a radiation dose of 4 kGy. This result suggested that the generation of crystal violet (CV+) proceeded efficiently by radicals generated from PVC. The addition of 1 wt% trichloroacetic acid (TCA) to a PVC film containing LCV increased the change in absorbance 1.2 times. This result suggested that the radicals generated by the decomposition of TCA induced the generation of CV+. The sensitivity to radiation of the film was 4.2-28 times greater than those of conventional plastics containing leuco dyes.

Original languageEnglish
Article number096001
JournalJapanese journal of applied physics
Volume59
Issue number9
DOIs
Publication statusPublished - 2020 Sep 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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