期刊
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
卷 47, 期 2, 页码 438-445出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/23.846277
关键词
LSO gamma-ray scintillator afterglow
LSO is known to exhibit afterglow for approximately 24 h following exposure to intense room light. We find that LSO also exhibits afterglow following activation by gamma rays in normal scintillation counting. This scintillation afterglow is characterized by an exponential decay time constant of 50 min and an absolute light yield, relative to the fast scintillation component, of 1.7. Unless special attention is paid to the afterglow signal in designing the data acquisition electronics used with LSO, the gamma ray energy resolution of the spectroscopy system can be ruined by baseline shifts occurring during the acquisition of an energy spectrum, With proper provisions to handle these predictable baseline shifts, LSO is a promising new scintillator for fast counting gamma ray spectroscopy.
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