Exclusive attributes of undoped poly (ethylene terephthalate) for alpha particle detection

Hidehito Nakamura*, Nobuhiro Sato, Hisashi Kitamura, Daisuke Maki, Yoshiyuki Shirakawa, Sentaro Takahashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Poly (ethylene terephthalate) (PET) is available worldwide and has a broad range of applications. However, its basic properties as a scintillation material that is undoped with fluorescent guest molecules are not completely known. Here, we optically characterise undoped PET for use in radiation detection. Light absorption is primarily below 350 nm, with an emission maximum at 385 nm. An effective refractive index, determined from the emission spectrum and the wavelength dependence of the refractive index, is 1.62, which is greater than that for the sodium D line (ND = 1.57). The density of PET is 1.33 g/cm3, and its stopping power for 1-MeV electrons is 1.72 MeV cm2/g. Distinct peaks generated by alpha particles from 210Pb and 241Am radioactive sources appear in PET light-yield distributions. The PET response to 5-6-MeV alpha particles is approximately one-eighth that for electrons. These results demonstrate that undoped PET has special attributes for alpha particle detection. This knowledge will enable better performance of radiation equipment based on PET and its blends with other aromatic ring polymers.

Original languageEnglish
Pages (from-to)54-58
Number of pages5
JournalRadiation Measurements
Publication statusPublished - 2016 Sept 1


  • Alpha particle detection
  • Aromatic ring polymer
  • Basic property
  • Poly (ethylene terephthalate)
  • Undoped scintillation material

ASJC Scopus subject areas

  • Radiation
  • Instrumentation


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