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Luminescence mechanism and energy transfer in doubly-doped BaY2F8:Tm,Nd VUV scintillator

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, , Citation J Pejchal et al 2010 IOP Conf. Ser.: Mater. Sci. Eng. 15 012018 DOI 10.1088/1757-899X/15/1/012018

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1 Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan

2 Institute of Physics AS CR, Cukrovarnicka 10, 16253 Prague, Czech Republic

3 Department of Materials Science, University of Milano-Bicocca, Via Cozzi 51, 20125 Milan, Italy

4 Tokuyama Corporation, Shibuya 3-chome, Shibuya-ku, Tokyo 150-8383 Japan

5 New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

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1757-899X/15/1/012018

Abstract

Doubly-doped BaY2F8:Tm,Nd scintillation crystals were grown by modified micro-pulling-down method. Nd co-doping was chosen to enhance the energy transfer from the host lattice to the Nd3+ luminescence center via the 5d-levels of Tm3+, due to the overlap of Tm3+ 5d-4f emission spectrum with the Nd3+ 4f-5d absorption. The energy transfer was clearly evidenced in the BaY2F8:Tm,Nd. This process is not complicated by an energy migration to killer centers and/or cross-relaxation. The radioluminescence process is complicated by an energy transfer from the host lattice exciton states to the lower f-levels of Tm3+ ion.

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10.1088/1757-899X/15/1/012018