Gamma ray spectroscopy and timing using LSO and PIN photodiodes
- Lawrence Berkeley Lab., CA (United States)
- Schlumberger-Doll Research, Ridgefield, CT (United States)
The high density, high light output, and short decay time of LSO (lutetium orthosilicate, Lu{sub 2}SiO{sub 5}:Ce) make it an attractive scintillator for gamma ray spectroscopy. The low cost, small size, high quantum efficiency, and ruggedness of silicon photodiodes make them attractive photodetectors for this same application, although their high noise (compared to a photomultiplier tube) reduces their appeal. In this work the authors measure the gamma ray energy resolution, timing accuracy, and conversion factor from gamma energy to number of electron-hole pairs produced with a 3 x 3 x 22 mm{sup 3} LSO scintillator crystal read out with a 3 x 3 mm{sup 2} silicon PIN photodiode. When the detector is excited with 511 keV photons, a photopeak centered at 4,910 e{sup {minus}} with 149 keV fwhm is observed and a timing signal with 25 ns fwhm jitter is produced. While these performance measures are inferior to those obtained with photomultiplier tubes, they are acceptable for some applications.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 129191
- Report Number(s):
- CONF-941061-; ISSN 0018-9499; TRN: IM9550%%559
- Journal Information:
- IEEE Transactions on Nuclear Science, Vol. 42, Issue 4Pt1; Conference: Institute of Electrical and Electronic Engineers (IEEE) nuclear science symposium and medical imaging conference, Norfolk, VA (United States), 30 Oct - 5 Nov 1994; Other Information: PBD: Aug 1995
- Country of Publication:
- United States
- Language:
- English
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