Positron and positronium in porous media: zeolites

Detalhes bibliográficos
Autor(a) principal: Kajcsos, Zs.
Data de Publicação: 2003
Outros Autores: Liszkay, L., Duplâtre, G., Lohonyai, L., Varga, L., Lázár, K., Pál-Borbély, G., Beyer, H. K., Caullet, P., Patarin, J., Lima, A. P. de, Gil, C. Lopes, Gordo, P. M., Marques, M. F. Ferreira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/4465
https://doi.org/10.1016/S0969-806X(03)00185-3
Resumo: Correlations between positronium (Ps) production features and positron annihilation (PA) parameters were investigated in various zeolite samples (MFI, mordenite, Na-Y). The contribution of 3[gamma]-annihilation on data registration was closely examined. Long lifetimes up to 135 ns and triplet Ps (o-Ps) fractions up to 30% were found. Even low amounts of adsorbed gases or water drastically change the PA pattern. It is concluded that in addition to the crystallographic free sites, large structural discontinuities also play an important role as they can trap Ps and provide it with vacuum-like survival conditions.
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spelling Positron and positronium in porous media: zeolitesZeolitesLong-living positroniumPorous structure3[gamma]-annihilationCorrelations between positronium (Ps) production features and positron annihilation (PA) parameters were investigated in various zeolite samples (MFI, mordenite, Na-Y). The contribution of 3[gamma]-annihilation on data registration was closely examined. Long lifetimes up to 135 ns and triplet Ps (o-Ps) fractions up to 30% were found. Even low amounts of adsorbed gases or water drastically change the PA pattern. It is concluded that in addition to the crystallographic free sites, large structural discontinuities also play an important role as they can trap Ps and provide it with vacuum-like survival conditions.http://www.sciencedirect.com/science/article/B6TVT-48KF810-2/1/8430b8c2999ae974e706966d129f1ae42003info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4465http://hdl.handle.net/10316/4465https://doi.org/10.1016/S0969-806X(03)00185-3engRadiation Physics and Chemistry. 68:3-4 (2003) 363-368Kajcsos, Zs.Liszkay, L.Duplâtre, G.Lohonyai, L.Varga, L.Lázár, K.Pál-Borbély, G.Beyer, H. K.Caullet, P.Patarin, J.Lima, A. P. deGil, C. LopesGordo, P. M.Marques, M. F. Ferreirainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:59:56Zoai:estudogeral.uc.pt:10316/4465Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:37.359440Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Positron and positronium in porous media: zeolites
title Positron and positronium in porous media: zeolites
spellingShingle Positron and positronium in porous media: zeolites
Kajcsos, Zs.
Zeolites
Long-living positronium
Porous structure
3[gamma]-annihilation
title_short Positron and positronium in porous media: zeolites
title_full Positron and positronium in porous media: zeolites
title_fullStr Positron and positronium in porous media: zeolites
title_full_unstemmed Positron and positronium in porous media: zeolites
title_sort Positron and positronium in porous media: zeolites
author Kajcsos, Zs.
author_facet Kajcsos, Zs.
Liszkay, L.
Duplâtre, G.
Lohonyai, L.
Varga, L.
Lázár, K.
Pál-Borbély, G.
Beyer, H. K.
Caullet, P.
Patarin, J.
Lima, A. P. de
Gil, C. Lopes
Gordo, P. M.
Marques, M. F. Ferreira
author_role author
author2 Liszkay, L.
Duplâtre, G.
Lohonyai, L.
Varga, L.
Lázár, K.
Pál-Borbély, G.
Beyer, H. K.
Caullet, P.
Patarin, J.
Lima, A. P. de
Gil, C. Lopes
Gordo, P. M.
Marques, M. F. Ferreira
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Kajcsos, Zs.
Liszkay, L.
Duplâtre, G.
Lohonyai, L.
Varga, L.
Lázár, K.
Pál-Borbély, G.
Beyer, H. K.
Caullet, P.
Patarin, J.
Lima, A. P. de
Gil, C. Lopes
Gordo, P. M.
Marques, M. F. Ferreira
dc.subject.por.fl_str_mv Zeolites
Long-living positronium
Porous structure
3[gamma]-annihilation
topic Zeolites
Long-living positronium
Porous structure
3[gamma]-annihilation
description Correlations between positronium (Ps) production features and positron annihilation (PA) parameters were investigated in various zeolite samples (MFI, mordenite, Na-Y). The contribution of 3[gamma]-annihilation on data registration was closely examined. Long lifetimes up to 135 ns and triplet Ps (o-Ps) fractions up to 30% were found. Even low amounts of adsorbed gases or water drastically change the PA pattern. It is concluded that in addition to the crystallographic free sites, large structural discontinuities also play an important role as they can trap Ps and provide it with vacuum-like survival conditions.
publishDate 2003
dc.date.none.fl_str_mv 2003
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/4465
http://hdl.handle.net/10316/4465
https://doi.org/10.1016/S0969-806X(03)00185-3
url http://hdl.handle.net/10316/4465
https://doi.org/10.1016/S0969-806X(03)00185-3
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Radiation Physics and Chemistry. 68:3-4 (2003) 363-368
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv aplication/PDF
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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