In situ luminescence and optical absorption measurements of silica in reactor core

In situ optical measurements of silica glasses under in-reactor and γ-ray irradiation have been carried out. Two types of emission bands attributed to B 2α and B 2β oxygen deficient centers were clearly distinguished from their different behavior with irradiation time. The B 2α center was created ma...

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Published inJournal of nuclear materials Vol. 307; pp. 1268 - 1272
Main Authors Yoshida, Tomoko, Ii, Tatsuya, Tanabe, Tetsuo, Yoshida, Hisao, Yamaguchi, Kenji
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2002
Subjects
P0400
N0100
G0100
S0400
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Summary:In situ optical measurements of silica glasses under in-reactor and γ-ray irradiation have been carried out. Two types of emission bands attributed to B 2α and B 2β oxygen deficient centers were clearly distinguished from their different behavior with irradiation time. The B 2α center was created mainly by the atomic displacement effect due to neutron irradiation. On the other hand, the B 2β center, which has two origins, intrinsic and newly formed (from its precursor states), was transformed to E ′ centers through the electronic excitation effect of γ-ray irradiation. The present in situ experiments also showed the possibility that the B 2β center can also be created by the displacement process caused by Compton electrons under γ-ray irradiation.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(02)01274-6