Positron sensitive scintillation detectors for γ-rays

Y. Nagai, H. Saito, T. Hyodo, H. Uchida, T. Omura

Research output: Contribution to journalConference articlepeer-review


We report a development of two types of γ-ray imagers for 2D-ACAR using position sensitive photomultiplier tubes (PS-PMT); (1) a thin Gd2SiO5 (GSO) single crystal disc coupled to a PS-PMT, (2) an 2D array of small Bi4Ge3O12 (BGO) crystal blocks coupled to a PS-PMT. In the type(1), position resolution is ≈3mm in the central area. An improvement of the performance is observed when a glass ring of the same thickness and the same index of refraction as the scintillator is placed around the scintillator. The type(2) gives higher detection efficiency and position resolution of 2.2mm in the whole sensitive area.

Original languageEnglish
Pages (from-to)971-974
Number of pages4
JournalMaterials Science Forum
Issue numberpt 2
Publication statusPublished - 1995 Jan 1
Externally publishedYes
EventProceedings of the 10th International Conference on Positron Annihilation. Part 1 (of 2) - Beijing, China
Duration: 1994 May 231994 May 29

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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