Radiation effects on the Tc of bi-system superconductors by proton and gamma irradiation

Bi-system superconductors, prepared by the solid state reaction method and the nitrate method, were irradiated by 20 MeV protons and gamma-rays produced by nuclear reaction. The T c0 and gamma-ray intensity were measured with the time after irradiation. The T c0 increases on the gamma-ray irradiatio...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 337; no. 1; pp. 234 - 238
Main Authors Zhao, Xinjie, Yu, Jinnan, Wang, Yuzhu, Yu, Gang, Chen, Yiren, Zhang, Zonghai
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2000
Subjects
Bi-system superconductor
Gamma irradiation
Proton irradiation
Radiation effects
Radiation effects
Gamma irradiation
Bi-system superconductor
Proton irradiation
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Summary:Bi-system superconductors, prepared by the solid state reaction method and the nitrate method, were irradiated by 20 MeV protons and gamma-rays produced by nuclear reaction. The T c0 and gamma-ray intensity were measured with the time after irradiation. The T c0 increases on the gamma-ray irradiation, then the T c0 decreases gradually with the gamma decay. The results indicate that there are two competitive effects on the specimen's T c0 during gamma irradiation. One is the coupling of excited electrons and holes to the superconductive carriers (such as Cooper-pairs) in which the energy gap is higher than normal one and induces the T c0 to increase. The other is the defects produced by the irradiation, which induced the T c0 to decrease. The proton irradiation causes the T c0 to decrease monotonously.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(00)00108-8