Background components of Ge detectors in Ogoya underground laboratory

详细信息	查看全文 | 推荐本文 |

• 作者：Hamajima ; Y. ; Komura ; K.
• 关键词：Ultra-low background ; Underground laboratory ; Gamma-ray measurement ; Plastic scintillator ; Cosmic ray
• 刊名：Applied Radiation and Isotopes
• 出版年：2004
• 期刊代码：6_09698043
• 类别：ce
• 出版时间：August - September, 2004
• 卷：61
• 期：2-3
• 页码：179-183
• 文件大小：335 K

摘要

Ogoya underground laboratory, (OUL; 270m water equivalent), has 5 well, 4 planar, and 1 coaxial-type ultra-low background Ge detectors with passive shield of old lead. An anticoincidence system with a plastic scintillator (PS) has been tested to reduce cosmic-ray-induced background. Energy spectra of PSs, coincidence counting rate, and angular distribution of cosmic rays were studied. Based on this study, we propose a new index of Ge surface area-normalized background counting rate (d⁻¹cm⁻²) to compare shielding efficiency between different types of Ge detectors.