Count-based monitoring of Anger-camera spectra--local energy shifts due to rotation.
Count-based monitoring of Anger-camera spectra--local energy shifts due to rotation.
复制标题
基于计数的Anger相机光谱监测——由于旋转导致的局部能量变化。
DOI：
10.1118/1.596660
复制
发表时间：
1991
期刊：
影响因子：
3.8
通讯作者：
Rogers,WL
中科院分区：
文献类型：
--
作者：
Swailem,FM;Koral,KF;Rogers,WL
本研究报告了一种光谱监测方法，其中（1）使用固定在相机上的小源，（2）在波峰一侧设置一个狭窄的偏移窗口，（3）测量计数率的变化以评估源附近的能量变化。对于一个相机模型，计数率在180°的旋转上从100%下降到76%，这意味着1.4keV的局部能量偏移。还观察了（1）宽对称、（2）20%对称和（3）10%不对称窗口随旋转的局部计数率变化。最后一个是在有限的使用，以部分补偿康普顿散射。背景和时间稳定性的影响进行了评估。
This study reports on a spectral monitoring method in which (1) a small source fixed to the camera is used, (2) a narrow, offset window is set on the side of the photopeak, and (3) variations in count rate are measured to assess energy shifts in the vicinity of the source. For one camera model, the count rate drops from 100% to 76% over a rotation of 180°, implying a local energy shift of 1.4 keV. Also looked for are local count‐rate variations with rotation for (1) wide‐symmetric, (2) 20%‐symmetric, and (3) 10%‐asymmetric windows. The last is in limited use to partially compensate for Compton scattering. The effects of background and time stability are assessed.