Calibration of an in-situ BEGe detector using semi-empirical and Monte Carlo techniques

Agrafiotis, K; Karfopoulos, KL; Anagnostakis, MJ

dc.contributor.author	Agrafiotis, K	en
dc.contributor.author	Karfopoulos, KL	en
dc.contributor.author	Anagnostakis, MJ	en
dc.date.accessioned	2014-03-01T01:35:23Z
dc.date.available	2014-03-01T01:35:23Z
dc.date.issued	2011	en
dc.identifier.issn	0969-8043	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21024
dc.subject	In-situ gamma-ray spectrometry	en
dc.subject	BEGe detector	en
dc.subject	Monte Carlo simulation	en
dc.subject.classification	Chemistry, Inorganic & Nuclear	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.classification	Radiology, Nuclear Medicine & Medical Imaging	en
dc.subject.other	HPGE DETECTOR	en
dc.subject.other	EFFICIENCY CALIBRATION	en
dc.subject.other	GAMMA-SPECTROMETRY	en
dc.subject.other	GE DETECTOR	en
dc.subject.other	SIMULATION	en
dc.subject.other	CURVE	en
dc.subject.other	RAYS	en
dc.title	Calibration of an in-situ BEGe detector using semi-empirical and Monte Carlo techniques	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.apradiso.2010.12.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.apradiso.2010.12.005	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	In the case of a nuclear or radiological accident a rapid estimation of the qualitative and quantitative characteristics of the potential radioactive pollution is needed. For aerial releases the radioactive pollutants are finally deposited on the ground forming a surface source. In this case, in-situ gamma-ray spectrometry is a powerful tool for the determination of ground pollution. In this work, the procedure followed at the Nuclear Engineering Department of the National Technical University of Athens (NED-NTUA) for the calibration of an in-situ Broad Energy Germanium (BEGe) detector, for the determination of gamma-emitting radionuclides deposited on the ground surface, is presented. BEGe detectors due to their technical characteristics are suitable for the analysis of photons in a wide energy region. Two different techniques were applied for the full-energy peak efficiency calibration of the BEGe detector in the energy region 60-1600 keV: a semi-empirical method based on the determination of the peak efficiency for a surface source geometry, from the experimentally obtained efficiency for a point source geometry a numerical method which is based on Monte Carlo simulation. For this purpose the PENELOPE computer code was employed. For the determination of the geometrical characteristics of the detector - a key parameter for the simulation accuracy - an iterative procedure involving a series of experiments and simulations was applied. Full-energy peak efficiencies determined using the two methods agree within statistical uncertainties. (C) 2010 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	APPLIED RADIATION AND ISOTOPES	en
dc.identifier.doi	10.1016/j.apradiso.2010.12.005	en
dc.identifier.isi	ISI:000292073600014	en
dc.identifier.volume	69	en
dc.identifier.issue	8	en
dc.identifier.spage	1151	en
dc.identifier.epage	1155	en