Development of Alkaline Earth Salts having Highly Enhanced Radiophotoluminescence Properties

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15207
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 31010:Nuclear engineering-related
• Research Institution: Kanazawa Institute of Technology
• Principal Investigator: OKADA GO 金沢工業大学, バイオ・化学部, 講師 (90757840)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: ラジオフォトルミネッセンス

Outline of Final Research Achievements

Radiophotoluminescence materials with a sulphate matrix have been developed. Among these, the material based on CaSO4 exhibited remarkable properties and good sensitivity to radiation dose. Furthermore, unlike conventional materials, the response values were stable immediately after irradiation and could be erased by applying heat. Furthermore, it was found that the radiophotoluminescence was reproducible after erasure by heat treatment in the same way as before erasure, and it was demonstrated that the material could be reused repeatedly.

Free Research Field

放射線計測

Academic Significance and Societal Importance of the Research Achievements

ラジオフォトルミネッセンスは現在個人被ばく線量計における放射線の検出ならびに線量の記録素子として用いられている。従来のラジオフォトルミネッセンス材料の種類は極めて少なく、この事が現象理解や材料設計指針の構築、新規応用展開の妨げとなっている。本研究では新たなラジオフォトルミネッセンス材料の開発に成功した。なかでも、放射線照射直後から応答値が安定である特性から、ラジオフォトルミネッセンス材料を用いたリアルタイム線量計測への応用展開が期待される。