2015/05/07 by Guojian Wang, M. Amman, Wang, Guojian +11 · 1 citation
Engineering · Physics and Astronomy · #Advanced Semiconductor Detectors and Materials #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Nuclear Experiment (nucl-ex) #Nuclear Physics and Applications #Silicon and Solar Cell Technologies
paper · pdf · doi:10.48550/arxiv.1505.01827
openalex publication_date 2015/05/07 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
High-purity germanium crystals approximately 12 cm in diameter were grown in a hydrogen atmosphere using the Czochralski method. The dislocation density of the crystals was determined to be in the range of 2000 - 4200 cm-2, which meets a requirement for use as a radiation detector. The axial and radial distributions of impurities in the crystals were measured and are discussed. A planar detector was also fabricated from one of the crystals and then evaluated for electrical and spectral performance. Measurements of gamma-ray spectra from Cs-137 and Am-241 sources demonstrate that the detector has excellent energy resolution.