A simulation of a CdTe gamma ray detector based on collection efficiency profiles as determined by lateral IBIC

Citation
E. Vittone et al., A simulation of a CdTe gamma ray detector based on collection efficiency profiles as determined by lateral IBIC, NUCL INST A, 428(1), 1999, pp. 81-87
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
428
Issue
1
Year of publication
1999
Pages
81 - 87
Database
ISI
SICI code
0168-9002(19990601)428:1<81:ASOACG>2.0.ZU;2-A
Abstract
Collection efficiency profiles as determined by the ion beam-induced charge (IBIC) technique have been considered to evaluate the spectroscopic perfor mance of a cadmium telluride (CdTe) nuclear radiation detector. The depende nce of such profiles on the applied bias voltage and the shaping time are p resented and discussed on the basis of a theoretical model, which is also u sed to evaluate the electron/hole collection lengths profiles. Experimental collection efficiency profiles were used as input data of the "ISIDE" Monte Carlo programme to simulate the CdTe response to gamma rays p roduced by Co-57. A systematic investigation of such spectra obtained under different detection conditions shows the effects of non constant collectio n efficiency profiles and ballistic deficit on the energy resolution of the detector. (C) 1999 Elsevier Science B.V. All rights reserved.