Stability study of the alanine epr dosimetry system at IPEN/CNEN SP

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dc.contributor.authorRODRIGUES JR ., ORLANDOpt_BR
dc.contributor.authorSANTOS, SILAS C. dospt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCEpt_BR
dc.date.accessioned2019-11-27T17:18:24Z
dc.date.available2019-11-27T17:18:24Z
dc.date.eventoOctober 21-25, 2019pt_BR
dc.description.abstractThe dosimetry system using alanine EPR is a standard secondary calibration system for high doses. IPEN's High Doses Dosimetry Laboratory (LDA) has an Electron Paramagnetic Resonance equipment operating in the X band which performs high dose dosimetry service for electron and X ray fields for the dose range of 10Gy to 200kGy. IPEN has established a dosimetry system based on an alanine dosimeter developed at the institute. The system is composed of pure DL alanine encapsulated in a polyethylene microtube, which allows estimated doses of 10Gy to 200kGy. The advantages of this system are the low signal fading over a long period of time (over 90 days) and dose measurements above 150kGy. The main disadvantage is the difficulty in measures below 10Gy. In order to improve quality assurance services delivered in radiotherapy, commercial alanine dosimeters are being tested and compared with the already established system for measurements with time intervals longer than 90 days. The present work is an evaluation of the commercial L alanine dosimeter signal compared to the alanine dosimeter produced in IPEN. The dosimeters were irradiated with X ray and E beam and doses of 1, 10 and 20Gy. All measurements were performed following the same laboratory protocol based in ISO/ASTM guidelines. Environmental effects such as temperature, sensitivity to light and air humidity, and other storage conditions were evaluated. The results show that the decay of commercial dosimeters over 36 months was 11% higher than that observed in the dosimeter developed in IPEN, indicating the need for a correction factor for the comparison of dosimetry systems.pt_BR
dc.event.siglaINACpt_BR
dc.format.extent259-264pt_BR
dc.identifier.citationRODRIGUES JR ., ORLANDO; SANTOS, SILAS C. dos. Stability study of the alanine epr dosimetry system at IPEN/CNEN SP. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. <b>Proceedings...</b> Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 259-264. Disponível em: http://repositorio.ipen.br/handle/123456789/30350.
dc.identifier.orcidhttps://orcid.org/0000-0002-6704-1910
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/30350
dc.localRio de Janeiropt_BR
dc.local.eventoSantos, SPpt_BR
dc.publisherAssociação Brasileira de Energia Nuclear
dc.rightsopenAccesspt_BR
dc.subjectalanine-l
dc.subjectcalibration
dc.subjectdosemeters
dc.subjectdosimetry
dc.subjectirradiation
dc.subjectradiation dose ranges
dc.subjectradiation doses
dc.titleStability study of the alanine epr dosimetry system at IPEN/CNEN SPpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorSILAS CARDOSO DOS SANTOS
ipen.autorORLANDO RODRIGUES JUNIOR
ipen.codigoautor6961
ipen.codigoautor322
ipen.contributor.ipenauthorSILAS CARDOSO DOS SANTOS
ipen.contributor.ipenauthorORLANDO RODRIGUES JUNIOR
ipen.date.recebimento19-11
ipen.event.datapadronizada2019pt_BR
ipen.identifier.ipendoc26138pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication6d1f35e3-57eb-471d-ae82-5f850a99e01b
relation.isAuthorOfPublicationf72d59d1-f942-442a-b16e-8b0ba0e2b671
relation.isAuthorOfPublication.latestForDiscoveryf72d59d1-f942-442a-b16e-8b0ba0e2b671
sigepi.autor.atividadeRODRIGUES JR ., ORLANDO:322:-1:Spt_BR
sigepi.autor.atividadeSANTOS, SILAS C. dos:6961:330:N
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