【摘要】 ２０ＭｅＶ质子辐照固态反应法和硝酸盐溶胶凝胶法制备的Ｂｉ－系超导体，伴随有核激发的γ及β射线辐照。在线测量的结果表明超导样品的零电阻温度Ｔ是增加的，但是随着时间的推移Ｔ值逐渐下降。我们测量了超导体的Ｔ和γ射线随时间的变化情况。发现Ｔ在伴随γ射线辐照下首先增加，而后逐渐下降。这表明γ射线对超导体的Ｔ存在两方面的影响，一是激发样品中的载流子，激发态的载流子构成载流子对，其能隙较宽，提高了：二是产生辐照缺陷，破坏超导体的微观结构，降低Ｔ质子辐照在超导样品中产生很多缺陷，降低Ｔ。更多还原

【Abstract】 Bi-system superconductors, prepared by solid state reaction method and nitrate method, were irradiated by 20 MeV proton and gamma ray caused by proton irradiation . The T∞ ( zero re- sistance temperature ) and gamma ray intensity was measured to show that T∞ increases first by gamma ray irradiation and then decreses gradually . The results indicated that there are two com- petive effects on the sample’s Tc during gamma irradiation . First is the excited carrier composed Cooper- pairs, with higher energy gap to increase T∞ Second is the irradiation defect to destroy superconductic mi- crostructue, and hence decrese Tc . The results of proton irradiation showed the monotonic decrease on T c .更多还原