Energy resolution of scintillation detectors readout with large area avalanche photodiodes and photomultipliers

Journal Article · Mon Jun 01 04:00:00 EDT 1998 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.682429· OSTI ID:624169

Moszynski, M; Wolski, D ^[1]; Kapusta, M ^[1]; Szawlowski, M ^[2]; Klamra, W ^[3]

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1. Soltan Inst. for Nuclear Studies, Swierk-Otwock (Poland)
2. Advanced Photonix, Inc., Camarillo, CA (United States)
3. Royal Inst. of Tech., Stockholm (Sweden). Dept. of Physics

The energy resolution of small NaI(Tl), CsI(Tl), BGO, GSO, YAP and LSO crystals has been studied using 16 mm diameter large area avalanche photodiodes (LAAPD) and a 52 mm diameter photomultiplier. The best result of 4.8% for 662 keV {gamma}-rays from a {sup 137}Cs source was obtained with a 9 mm in diameter by 9 mm high CsI(Tl) scintillator coupled to an LAAPD. Measuring the number of primary electron-hole pairs produced in the LAAPD and photoelectrons in the photomultiplier, as well as the noise contribution of the LAAPD, allowed a quantitative discussion of the results. The energy resolutions measured with LAAPDs are comparable to, or significantly better (at certain emission wavelengths) than, those obtained with the photomultiplier. At energies above 100 keV the energy resolution measured with the majority of crystals and the LAAPD was weakly affected by the photodiode noise contribution. The advantages and limitations of LAAPDs in energy spectrometry with scintillation detectors are also discussed.

• OSTI ID: 624169
• Report Number(s): CONF-971147--
• Journal Information: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 3Pt1 Vol. 45; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
DOPED MATERIALS
ENERGY RESOLUTION
GAMMA SPECTROMETERS
GERMANATES
INORGANIC PHOSPHORS
IODIDES
PHOSPHIDES
READOUT SYSTEMS
SILICATES
SOLID SCINTILLATION DETECTORS