Low energy γ-rays scintillation detection with large area avalanche photodiodes

Author

Moszynski, M. ; Kapusta, M. ; Zalipska, J. ; Balcerzyk, M. ; Wolski, D. ; Szawlowski, M. ; Klamra, W.

Author_Institution

Soltan Inst. for Nucl. Studies, Warsaw, Poland

Volume

46

Issue

4

fYear

1999

fDate

8/1/1999 12:00:00 AM

Firstpage

880

Lastpage

885

Abstract

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 γ-rays. Energy resolutions of 11.3% and 8.4% were obtained for 59.6 keV γ-rays from ²⁴¹Am and 122 keV γ-rays from ⁵⁷Co 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 γ-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 γ-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

Keywords

avalanche photodiodes; caesium compounds; gamma-ray detection; lutetium compounds; sodium compounds; solid scintillation detectors; thallium; yttrium compounds; CsI(Tl); CsI:Tl; LSO; Lu₂SiO₄:Ce; NaI(Tl); NaI:Tl; YAP; YAlO3; energy resolution; intrinsic energy resolution; large area avalanche photodiodes; low energy gamma-rays scintillation detection; primary electron-hole pairs; Avalanche photodiodes; Crystals; Energy measurement; Energy resolution; Gamma ray detection; Gamma ray detectors; IEEE members; Noise measurement; Solid scintillation detectors; Testing;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.790697

Filename

790697