Position sensitivity in 3"×3" Spectroscopic LaBr3:Ce Crystals

[摘要] The position sensitivity of a thick, cylindrical and continuous 3» 3» (7.62 cm 7.62 cm) LaBr3:Ce crystal with diffusive surfaces was investigated. Nuclear physics basic research uses thick LaBr3:Ce crystals (> 3cm) to measure medium or high energy gamma rays (0.5 MeV γ3:Ce crystal with diffusive surfaces the position of the full energy peak centroid depends on the source position. The position of the full energy peak centroids are sufficient to identify the collimated gamma source position. The crystal was then coupled to four Position Sensitive Photomultipliers (PSPMT). We acquired the signals from the 256 segments of the four PSPMTs grouping them into 16 elements. An event by event analysis shows a positon resolution of the order of 2 cm.

[发布机构] INFN- Sezione di Milano, Italy^1;Physics Department, University of Milano, Italy^2

[效力级别] 工业技术 [学科分类] 工业工程学

[关键词] Entrance window;Event analysis;Full energy peak;Gamma source;High energy gamma rays;Position sensitive photomultipliers;Position sensitivity;Source position