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Intrinsic energy resolution of pure NaI studied with large area avalanche photodiodes at liquid nitrogen temperatures
KTH, Superseded Departments, Physics.
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2003 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 505, no 02-jan, 63-67 p.Article in journal (Refereed) Published
Abstract [en]

The energy resolution and non-proportionality of the light yield vs gamma-ray energy of pure NaI scintillators directly coupled to Large Area Avalanche Photodiodes (LAAPDs) and cooled down to the liquid nitrogen temperatures have been studied. Large improvements of energy resolution and nearly proportional light yield response have been obtained at very long shaping time constants. Energy resolution of 3.8+/-0.1% for 662 keV gamma-rays from a Cs-137 source was recorded at 50 mus integration time. The intrinsic resolution of the crystal vs energy of gamma-rays has been estimated by measurements of the number of primary electron-hole pairs generated in LAAPD by scintillation light.

Place, publisher, year, edition, pages
2003. Vol. 505, no 02-jan, 63-67 p.
Keyword [en]
scintillators, pure NaI, energy resolution, intrinsic resolution, non-proportinality of light yield, avalanche photodiodes, yield non-proportionality, scintillation response, sodium-iodide
Identifiers
URN: urn:nbn:se:kth:diva-22616ISI: 000183713700018OAI: oai:DiVA.org:kth-22616DiVA: diva2:341314
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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