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高T_c超导体(HTSC)实际应用的关键之一是,人为地在HTSC里引入钉扎中心,从而增强磁通钉扎,较大幅度地提高临界电流密度J_c。实验证明,在提高J_c上,中子辐照比电子和质子辐照至少有效1000倍。近年来中子辐照已成为理论研究和实际应用的热门课题。当前人们所研究的大都是来自反应堆的,高通量(～10~(16)—10~(18)n/cm_2)快中子(E_n>0.1MeV)对HTSC的辐照效应。 Y系和Bi系多晶样品在高通量快中子辐照以后,样品的磁
One of the keys to the practical application of high Tc superconductors (HTSCs) is to artificially introduce pinning centers into the HTSCs to enhance flux pinning and greatly increase the critical current density J_c. Experiments show that, in improving J_c, neutron irradiation than electron and proton irradiation at least 1000 times. In recent years, neutron irradiation has become a hot topic in theoretical research and practical application. At present, most researchers have studied the irradiation effects of high-throughput (~ 10 ~ (16) -10 ~ (18) n / cm 2) fast neutrons (E_n> 0.1MeV) on the HTSC from the reactor. Samples of the Y and Bi polycrystalline samples were magnetised after high-throughput fast neutron irradiation