Low energy {gamma}-rays scintillation detection with large area avalanche photodiodes
- Soltan Inst. for Nuclear Studies, Swierk-Otwock (Poland)
- Advanced Photonix, Inc., Camarillo, CA (United States)
- Royal Inst. of Tech., Stockholm (Sweden). Dept. of Physics
Energy resolution of NaI(Tl), CsI(Tl), LSO and YAP crystals coupled to 16 mm diameter Large Area Avalanche Photodiodes (LAAPD) was studied for low energy {gamma}-rays. Energy resolutions of 11.3% and 8.4% were obtained for 59.6 keV {gamma}-rays from {sup 241}Am and 122 keV {gamma}-rays from {sup 57}Co sources, respectively, as measured with a 10 mm diameter by 10 mm high NaI(Tl) crystal. The optimization of the LAAPD performance is presented, being essential for improvement of energy resolution at low energy {gamma}-rays. Measured numbers of primary electron-hole pairs produced in LAAPDs and evaluation of noise contribution of these devices allowed for quantitative discussion of the results. Particularly, the intrinsic energy resolution of the crystals vs. energy of {gamma}-rays has been evaluated. Obtained data for NaI(Tl) crystal showed a good agreement (within 30%) with calculated component due to nonproportional light yield for energies above 50 keV.
- OSTI ID:
- 684551
- Report Number(s):
- CONF-981110--
- Journal Information:
- IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt1 Vol. 46; ISSN 0018-9499; ISSN IETNAE
- Country of Publication:
- United States
- Language:
- English
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