[15p-P14-1~71] 2 Ionizing Radiation（Poster）

[15p-P14-9] Radio-Photoluminescence in KBr:Sm Single Crystal

〇GO OKADA¹, YUTAKA FUJIMOTO², HIROAKI TANAKA², SAFA KASAP³, TAKAYUKI YANAGIDA¹ (1.NAIST, 2.Tohoku Univ., 3.USask)

Keywords:Sm, Radio-Photoluminescence, X-rays

Sm-doped KBr single crystals were synthesized by Bridgeman method and we have studied the radio-photoluminescence properties. By X-ray irradiation, the doped Sm³⁺ ion was reduced to the Sm²⁺ state, and this reduction process was clearly seen in photoluminescence spectrum. Upon heat-treatment, the Sm²⁺ singal was effectively suppressed. Analyses with thermally-stimulated luminescence suggested that themally detrapped holes recombine with Sm²⁺ ion, followed by the Sm²⁺→Sm³⁺ reaction.