Crystal growth and detector performance of large size high-purity Ge crystals
| Autor: | Wang, Guojian, Amman, Mark, Mei, Hao, Mei, Dongming, Irmscher, Klaus, Guan, Yutong, Yang, Gang |
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| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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. Comment: 22 pages, 11 figures, Accepted for publication in Materials Science in Semiconductor Processing |
| Databáze: | arXiv |
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