Evaluation of Antimony Tri-Iodide Crystals for Radiation Detectors

Toshiyuki Onodera, Koei Baba, Keitaro Hitomi

Research output: Contribution to journalArticle

Abstract

This study was carried out to examine the potential of antimony tri-iodide (SbI 3 ) as a material for radiation detectors that operate at room temperature. SbI 3 is a compound semiconductor with an AsI 3 -type crystal structure, high atomic number (Sb: 51, I: 53), high density (4.92 g/cm 3 ), and a wide band-gap energy (2.2 eV). In addition, crystalline SbI 3 is easy to grow by conventional crystal growth techniques from melting phase because the material exhibits a low melting point (171°C) and undergoes no phase transition in the range of its solid phase. In this study, SbI 3 crystals were grown by the Bridgman method after synthesis of SbI 3 from 99.9999% pure Sb and 99.999% pure I 2 . The grown crystals consisted of several large grains with red color and were confirmed to be single-phase crystals by X-ray diffraction analysis. SbI 3 detectors with a simple planar structure were fabricated using the cleavage plates of the grown crystals, and the pulse-height spectra were recorded at room temperature using an 241 Am alpha-particle (5.48 MeV) source. The detector showed response to the alpha-particle radiation.

Original languageEnglish
Article number1532742
JournalScience and Technology of Nuclear Installations
Volume2018
DOIs
Publication statusPublished - 2018 Jan 1

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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