Blue enhanced large area avalanche photodiodes in scintillation detection with LSO, YAP and LuAP crystals

Author

Moszynski, M. ; Kapusta, M. ; Wolski, D. ; Szawlowski, M. ; Klamra, W.

Author_Institution

Soltan Inst. for Nucl. Studies, Warsaw, Poland

Volume

44

Issue

3

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

436

Lastpage

442

Abstract

Scintillation detectors consisting of LSO, LuAP and YAP crystals fitted to bevelled-edge large area avalanche photodiodes of 10 mm in diameter characterised by a high quantum efficiency up to 68% at 350 nm wavelength were studied. Among the properties measured were the number of electron-hole pairs, energy resolution and noise contribution of the LAAPDs at shaping time constants down to 20 ns at different gains. High electron-hole pair numbers of 11000±550 e-h/MeV and 19500±980 e-h/MeV for the YAP and LSO crystals were measured, respectively. The energy resolution for ¹³⁷Cs γ-rays of 5.9% in FWHM for the YAP crystal, much better than that of 9.9% for the LSO crystal were measured at 0.5 μs shaping time constant and the APD gain of 40. The same study done with a fast shaping of 20 ns and the APD gain of 160 showed the energy resolution of 6.7%

Keywords

avalanche photodiodes; gamma-ray detection; lutetium compounds; solid scintillation detectors; yttrium compounds; ¹³⁷Cs γ-rays; LSO crystals; Lu₂(SiO₄)O:Ce; LuAP crystals; LuAlO₃:Ce; YAP; YAP crystals; YAlO3; blue enhanced large area avalanche photodiodes; electron-hole pairs; energy resolution; fast shaping; high electron-hole pair numbers; noise contribution; quantum efficiency; scintillation detection; shaping time constant; Avalanche photodiodes; Crystals; Energy measurement; Energy resolution; Gain measurement; Noise measurement; Noise shaping; Scintillation counters; Time measurement; Wavelength measurement;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.603686

Filename

603686