TY - JOUR
T1 - La-doped PbWO4 scintillating crystals grown in large ingots
AU - Hara, Kazuhiko
AU - Ishii, Mitsuru
AU - Kobayashi, Masaaki
AU - Nikl, Martin
AU - Takano, Hideaki
AU - Tanaka, Masashi
AU - Tanji, Kiyokazu
AU - Usuki, Yoshiyuki
N1 - Funding Information:
The authors would like to express their deep thanks to H. Ishibashi (Hitachi Chem. Co.) for help in using the spectrophotometer (U-3400 equipped with a large sample chamber) and helpful discussions, and to H. Nagayama (JAERI) for precise irradiation. One of the authors (MK) is deeply thankful to H. Sugawara, S. Iwata, S. Yamada and K. Nakamura of KEK for supporting the present work. The present work is partly supported by a Grant-in-Aid from the Japanese Ministry of Education, Science and Culture.
PY - 1998/9/11
Y1 - 1998/9/11
N2 - We achieved a significant increase in the ingot size of La-doped PbWO4 single crystals to 65 mm in diameter and 300 mm in length by using the Czochralski technique and three times of recrystallization. Four blocks each with a typical size of 20 × 20 × 230 mm3 were taken from an ingot. The optical as well as the scintillation characteristics of the large-size crystals, including the radiation hardness, were found to be similar to or even better than those of smaller crystals. The radiation-induced absorption coefficient μir was as small as 0.5-1 m-1 at 107 rad of 60Co γ-ray irradiation.
AB - We achieved a significant increase in the ingot size of La-doped PbWO4 single crystals to 65 mm in diameter and 300 mm in length by using the Czochralski technique and three times of recrystallization. Four blocks each with a typical size of 20 × 20 × 230 mm3 were taken from an ingot. The optical as well as the scintillation characteristics of the large-size crystals, including the radiation hardness, were found to be similar to or even better than those of smaller crystals. The radiation-induced absorption coefficient μir was as small as 0.5-1 m-1 at 107 rad of 60Co γ-ray irradiation.
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U2 - 10.1016/S0168-9002(98)00634-2
DO - 10.1016/S0168-9002(98)00634-2
M3 - Article
AN - SCOPUS:0032164531
SN - 0168-9002
VL - 414
SP - 325
EP - 331
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 2-3
ER -