| Monte Carlo simulation to positron emitter standardized by means of 4pibeta-gamma coincidence system--application to 22Na. | |
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MedLine Citation:
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PMID: 20056429 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The present work describes the methodology for predicting the behavior of extrapolation curves obtained in radionuclide standardization by 4pibeta-gamma coincidence measurements, applied to (22)Na, developed at the Laboratório de Metrologia Nuclear of IPEN-CNEN/SP (LMN-Nuclear Metrology Laboratory). The LMN system consists of a proportional counter (PC) in 4pi geometry coupled to a single or a pair of NaI(Tl) scintillation crystals. Two standardization techniques were used: the Sum-Peak and the Nuclear-Peak methods. The theoretical response functions of each detector have been calculated using the MCNPX Monte Carlo code. The code ESQUEMA, developed at LMN, has been used for calculating the extrapolation curve in the 4pibeta-gamma coincidence experiment. Modifications were performed in order to include response tables for positrons and coincidences with annihilation photons. From the calibration results it was possible to extract both the activity value and the positron emission probability per decay. The latter was compared with results from the literature. |
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Authors:
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Mauro S Dias; Margareth L O Tongu; Mauro N Takeda; Marina F Koskinas |
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Publication Detail:
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Type: Journal Article Date: 2009-12-21 |
Journal Detail:
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Title: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine Volume: 68 ISSN: 1872-9800 ISO Abbreviation: Appl Radiat Isot Publication Date: 2010 Jul-Aug |
Date Detail:
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Created Date: 2010-05-24 Completed Date: 2010-08-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9306253 Medline TA: Appl Radiat Isot Country: England |
Other Details:
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Languages: eng Pagination: 1362-6 Citation Subset: - |
Copyright Information:
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Copyright 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Centro do Reator de Pesquisas-CRPq, São Paulo, SP, Brazil. msdias@ipen.br |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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