Microstructure Study in Slow Neutron Irradiated Bi-2223

The effect of slow neutron irradiation at a low Auence of about 10⁸n/cm² on the microstructures of Bi-2223 polycrystalline samples was observed by transmission electron microscopy. By comparative study of the defect structures in a given area in one sample, we get evidence for the flux pinning enhancement by low Auence slow neutron irradiation.