Logo do repositório
 

Potentialities and practical limitations of absolute neutron dosimetry using thin films of uranium and thorium applied to the fission track dating

dc.contributor.authorBigazzi, G.
dc.contributor.authorGuedes, S.
dc.contributor.authorHadler, J. C.
dc.contributor.authorIunes, P. J.
dc.contributor.authorPaulo, SR
dc.contributor.authorOddone, M.
dc.contributor.authorOsorio, A. M.
dc.contributor.authorZuniga, A.
dc.contributor.institutionCNR
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniv Fed Mato Grosso
dc.contributor.institutionUniv Pavia
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInstituto de Pesquisas Energéticas e Nucleares (IPEN)
dc.date.accessioned2014-05-20T15:21:00Z
dc.date.available2014-05-20T15:21:00Z
dc.date.issued1999-06-01
dc.description.abstractNeutron dosimetry using natural uranium and thorium thin films makes possible that mineral dating by the fission-track method can be accomplished, even when poor thermalized neutron facilities are employed. In this case, the contributions of the fissions of (235)U, (238)U and (232)Th induced by thermal, epithermal and fast neutrons to the population of tracks produced during irradiation are quantified through the combined use of natural uranium and thorium films.If the Th/U ratio of the sample is known, only one irradiation (where the sample and the films of uranium and thorium are present) is necessary to perform the dating. However, if that ratio is unknown, it can be determined through another irradiation where the mineral to be dated and both films are placed inside a cadmium box.Problems related with film manufacturing and calibration are discussed. Special attention is given to the utilization of thin films having very low uranium content. The problems faced suggest that it may be better to substitute these films by uranium doped standard glasses calibrated with thicker uranium films (thickness greater than 1.5 x 10(13) mu m).en
dc.description.affiliationCNR, Ist Geocronol & Geochim Isotop, I-56100 Pisa, Italy
dc.description.affiliationUniv Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP, Brazil
dc.description.affiliationUniv Fed Mato Grosso, ICET, Dept Fis, BR-78060900 Cuiaba, Mato Grosso, Brazil
dc.description.affiliationUniv Pavia, Dipartimento Chim Gen, I-27100 Pavia, Italy
dc.description.affiliationUNESP, Dept Ciências Ambientais, BR-19060900 Presidente Prudente, SP, Brazil
dc.description.affiliationIPEN, Lima 41, Peru
dc.description.affiliationUnespUNESP, Dept Ciências Ambientais, BR-19060900 Presidente Prudente, SP, Brazil
dc.format.extent651-656
dc.identifierhttp://dx.doi.org/10.1016/S1350-4487(99)00161-4
dc.identifier.citationRadiation Measurements. Oxford: Pergamon-Elsevier B.V., v. 31, n. 1-6, p. 651-656, 1999.
dc.identifier.doi10.1016/S1350-4487(99)00161-4
dc.identifier.issn1350-4487
dc.identifier.urihttp://hdl.handle.net/11449/32190
dc.identifier.wosWOS:000081997700124
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofRadiation Measurements
dc.relation.ispartofjcr1.369
dc.relation.ispartofsjr0,509
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.subjectneutron dosimetrypt
dc.subjecturanium thin filmspt
dc.subjectthorium thin filmspt
dc.subjectfission track datingpt
dc.titlePotentialities and practical limitations of absolute neutron dosimetry using thin films of uranium and thorium applied to the fission track datingen
dc.typeArtigopt
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
unesp.author.lattes1543738193935256[7]
unesp.author.orcid0000-0002-3727-2574[7]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências e Tecnologia, Presidente Prudentept

Arquivos

Licença do pacote

Agora exibindo 1 - 1 de 1
Carregando...
Imagem de Miniatura
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição: