The effect of radiation damage on optical and scintillation properties of BGO crystals grown by the LTG Cz technique

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 486; no. 1; pp. 350 - 354
• Main Authors: Gusev, V.A, Ivannikova, N.V, Kupriyanov, I.N, Kuznecov, G.N, Shlegel, V.N, Antsygin, V.D, Vasiliev, Ya.V
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 21-06-2002
• Subjects: BGO; Light output; Optical transmission; Radiation damage; Recovery; 29.40.Mc; 78.20.−e; Optical transmission; 61.80.−x; BGO; Recovery; Radiation damage; Light output
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(02)00732-5

BGO crystals grown by the low-thermal-gradient Czochralski technique (LTG Cz) exhibit two distinct types of behavior upon radiation damage and recovery. The crystals termed as of L-type remain colorless after γ-radiation doses as high as 10
Mrad. As the irradiation dose increases the scintillation light output shows a weak monotonous degradation to 15–25%, saturating at around several hundreds krad doses. The crystals termed as of N-type attain yellow coloration after irradiation. The light output drops abruptly for 35–50% as early as after 1
krad and does not change further on. The present work is devoted to the study of radiation damage effects, self-recovery, optically stimulated recovery and thermo-stimulated current in the L- and N-type BGO crystals produced by LTG Cz.