Undoped CaSO4 showing highly enhanced radio-photoluminescence properties. (September 2020)

• Record Type: Journal Article
• Authors: Okada, Go; Koguchi, Yasuhiro; Yanagida, Takayuki; Nanto, Hidehito
• Is Part Of: Materials today communications. Volume 24(2020)
• Publication Date: 2020-09
• Subjects: Phosphor -- RPL -- Sensing -- CaSO4; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2020.101013
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: In this paper, we report that undoped CaSO4 shows radio-photoluminescence (RPL) properties. The RPL is a rare phenomenon in which a luminescence centre is generated by ionizing radiation. This material, as prepared, does not show photoluminescence (PL) whereas a strong PL appears in irradiated material with a broad emission band peaking around 690 nm under 590 nm of excitation. The sensitivity of RPL to x-ray dose is about 10 times higher than that of commercial RPL detector used for personnel dosimetric applications. No signs of signal fading or build-up are observed even after 20 readouts, which enables the application of RPL from CaSO4 to real-time sensing.