u/Ni/4H-SiC肖特基结型α粒子探测器的性能研究

In this paper, the Au/Ni/4H-SiC Schottky barrier detectors for alpha-particle were fabricated and their electrical characteristics and detection peiformances were measured at room temperature and pressure. The Schottky barrier height of 1.37eV and the ideality factor of 1.21 was calculated from the forward currrent-voltage characteristic. The 239Pu and 241Am mixed radiation source was used to measure the responses of detector to the alpha-particle. At zero applied bias, the detector has the response for the alpha-particles, but the energy resolution is poor. The detector leakage current were observed to be 0.23nA at a reverse bias voltage of 50V. A better energy resolution of 3.00% and 2.90% for the 5156keV and 5486keV alpha-particle was obtained.