Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power
Autor(a) principal: | |
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Data de Publicação: | 1996 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/104206 |
Resumo: | Thin poly(phenylene sulphide) foils were bombarded with fast atomic ions (4He, 12C, 16O, 32S, 79Br, 127I) in the energy range between 2.5 to 78 MeV. In order to maintain the same ion track size for all impacting ions, their initial velocity was kept constant at 1.1 cm/ns. Under these conditions the deposited energy density in a single ion track changes as a result of the varying stopping power (dE/dx) of the projectiles in the material. Fourier transform infrared spectroscopy and UV-visible spectroscopy were used to characterize the irradiated targets. Damage cross sections (σ) for different chemical bonds, such as C-S and ring C-C bonds, are extracted from the IR data. For all analyzed IR bands, the values of σ scale roughly with the square of dE/dx (energy density in a single ion track). The absorption of the irradiated samples in the visible and UV region increases as a function of fluence. The rate of increase of absorption at a particular wavelength scales also as (dE/dx)n with n~2. The observed nonlinear dependence of the damage cross sections on the deposited energy density is considered in the light of two models: a statistical model based on the fluctuations of the energy deposited by the primary ions (hit theory) and an activation (thermal spike) model. It is found that the damage cross section is not determined directly by the initial deposited energy density distribution. The best agreement between experiment and theory is obtained when transport of the deposited energy occurs. |
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Papaleo, Ricardo MeurerHallen, A.Sundqvist, B.U.R.Araujo, Marco Aurelio deJohnson, R.E.Farenzena, Lucio SartoriLivi, Rogerio Pohlmann2014-10-07T02:11:18Z19960163-1829http://hdl.handle.net/10183/104206000148817Thin poly(phenylene sulphide) foils were bombarded with fast atomic ions (4He, 12C, 16O, 32S, 79Br, 127I) in the energy range between 2.5 to 78 MeV. In order to maintain the same ion track size for all impacting ions, their initial velocity was kept constant at 1.1 cm/ns. Under these conditions the deposited energy density in a single ion track changes as a result of the varying stopping power (dE/dx) of the projectiles in the material. Fourier transform infrared spectroscopy and UV-visible spectroscopy were used to characterize the irradiated targets. Damage cross sections (σ) for different chemical bonds, such as C-S and ring C-C bonds, are extracted from the IR data. For all analyzed IR bands, the values of σ scale roughly with the square of dE/dx (energy density in a single ion track). The absorption of the irradiated samples in the visible and UV region increases as a function of fluence. The rate of increase of absorption at a particular wavelength scales also as (dE/dx)n with n~2. The observed nonlinear dependence of the damage cross sections on the deposited energy density is considered in the light of two models: a statistical model based on the fluctuations of the energy deposited by the primary ions (hit theory) and an activation (thermal spike) model. It is found that the damage cross section is not determined directly by the initial deposited energy density distribution. The best agreement between experiment and theory is obtained when transport of the deposited energy occurs.application/pdfengPhysical review. B, Condensed matter. New York. Vol. 53, n. 5 (Feb. 1996), p. 2303-2313Física da matéria condensadaPolímeros : Energia nuclear : Espectroscopia : Modelos estatisticosChemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping powerEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000148817.pdf000148817.pdfTexto completo (inglês)application/pdf167588http://www.lume.ufrgs.br/bitstream/10183/104206/1/000148817.pdf3ad63b69deaba635518d6f9b5ac8ec24MD51TEXT000148817.pdf.txt000148817.pdf.txtExtracted Texttext/plain55033http://www.lume.ufrgs.br/bitstream/10183/104206/2/000148817.pdf.txtadf4b819a3a8251c16266b6eba3d6020MD5210183/1042062018-06-07 02:32:18.897733oai:www.lume.ufrgs.br:10183/104206Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-06-07T05:32:18Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power |
title |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power |
spellingShingle |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power Papaleo, Ricardo Meurer Física da matéria condensada Polímeros : Energia nuclear : Espectroscopia : Modelos estatisticos |
title_short |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power |
title_full |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power |
title_fullStr |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power |
title_full_unstemmed |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power |
title_sort |
Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power |
author |
Papaleo, Ricardo Meurer |
author_facet |
Papaleo, Ricardo Meurer Hallen, A. Sundqvist, B.U.R. Araujo, Marco Aurelio de Johnson, R.E. Farenzena, Lucio Sartori Livi, Rogerio Pohlmann |
author_role |
author |
author2 |
Hallen, A. Sundqvist, B.U.R. Araujo, Marco Aurelio de Johnson, R.E. Farenzena, Lucio Sartori Livi, Rogerio Pohlmann |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Papaleo, Ricardo Meurer Hallen, A. Sundqvist, B.U.R. Araujo, Marco Aurelio de Johnson, R.E. Farenzena, Lucio Sartori Livi, Rogerio Pohlmann |
dc.subject.por.fl_str_mv |
Física da matéria condensada Polímeros : Energia nuclear : Espectroscopia : Modelos estatisticos |
topic |
Física da matéria condensada Polímeros : Energia nuclear : Espectroscopia : Modelos estatisticos |
description |
Thin poly(phenylene sulphide) foils were bombarded with fast atomic ions (4He, 12C, 16O, 32S, 79Br, 127I) in the energy range between 2.5 to 78 MeV. In order to maintain the same ion track size for all impacting ions, their initial velocity was kept constant at 1.1 cm/ns. Under these conditions the deposited energy density in a single ion track changes as a result of the varying stopping power (dE/dx) of the projectiles in the material. Fourier transform infrared spectroscopy and UV-visible spectroscopy were used to characterize the irradiated targets. Damage cross sections (σ) for different chemical bonds, such as C-S and ring C-C bonds, are extracted from the IR data. For all analyzed IR bands, the values of σ scale roughly with the square of dE/dx (energy density in a single ion track). The absorption of the irradiated samples in the visible and UV region increases as a function of fluence. The rate of increase of absorption at a particular wavelength scales also as (dE/dx)n with n~2. The observed nonlinear dependence of the damage cross sections on the deposited energy density is considered in the light of two models: a statistical model based on the fluctuations of the energy deposited by the primary ions (hit theory) and an activation (thermal spike) model. It is found that the damage cross section is not determined directly by the initial deposited energy density distribution. The best agreement between experiment and theory is obtained when transport of the deposited energy occurs. |
publishDate |
1996 |
dc.date.issued.fl_str_mv |
1996 |
dc.date.accessioned.fl_str_mv |
2014-10-07T02:11:18Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/104206 |
dc.identifier.issn.pt_BR.fl_str_mv |
0163-1829 |
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000148817 |
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0163-1829 000148817 |
url |
http://hdl.handle.net/10183/104206 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter. New York. Vol. 53, n. 5 (Feb. 1996), p. 2303-2313 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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