Advantages and limitations of LSO scintillator in nuclear physics experiments
- Soltan Institute for Nuclear Studies, Swierk-Otwock (Poland)
- Royal Institute of Technology, Stockholm (Sweden). Dept. of Physics
- Lebedev Physical Institute, Moscow (Russian Federation)
Light yield, light pulse shape due to {gamma}-rays and {alpha}-particles, energy and time resolutions for three different samples of the LSO scintillator were studied using an XP2020Q photomultiplier and an S3590-03 photodiode. Light yields of 4,200{+-}200 phe/MeV and 18,500{+-}900 e-h pair/MeV were measured for the PM tube and the photodiode, respectively. The light pulse shape exhibits a pure exponential decay with a time constant of 47.2{+-}1.3 ns for both {gamma}-rays and {alpha}-particles. Energy resolutions of 10% and 14.6% for the 662 keV {gamma}-rays from a {sup 137}Cs source were obtained for the photomultiplier and the photodiode readout, respectively. A time resolution of 180 ns was observed for {sup 60}Co {gamma}-rays at 1 MeV threshold and 400 ps for 100 keV threshold. The study confirmed a number of advantages of the LSO scintillator for nuclear physics experiments, however, for small size samples. For larger volumes the natural radioactivity of the LSO, about 300 counts/s/cm{sup 3}, may limit possible applications. The high number of e-h pair produced in the photodiodes makes LSO very attractive for small compact scintillation probes.
- OSTI ID:
- 129143
- Report Number(s):
- CONF-941061--
- Journal Information:
- IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt1 Vol. 42; ISSN 0018-9499; ISSN IETNAE
- Country of Publication:
- United States
- Language:
- English
Similar Records
Gamma ray spectroscopy and timing using LSO and PIN photodiodes
Subnanosecond timing with large area avalanche photodiodes and LSO scintillator