Stacked polymide(PI)filns of abou 25μm in thickness were irradiated with 1.755 GeV Xenon ions under vacuum and at room temperature.The chemical changes of modified PI films were studied by Fourier Transfbrm Infrared(...Stacked polymide(PI)filns of abou 25μm in thickness were irradiated with 1.755 GeV Xenon ions under vacuum and at room temperature.The chemical changes of modified PI films were studied by Fourier Transfbrm Infrared(FTIR)spectroscopy.The IR spectra corresponding to pristine and Xe ions irradiated(1st layer展开更多
Swift heavy ions in matter lose energy mainly through electronic processes.Since the energy deposition is centered in a very small region with a very high energy density,new effects such as production of alkyne end gr...Swift heavy ions in matter lose energy mainly through electronic processes.Since the energy deposition is centered in a very small region with a very high energy density,new effects such as production of alkyne end group can be induced.In this work,PET,PS,PC and PI films are irradiated with Ar,Kr,Xe and U ions and the relationship of the alkyne end group production with electronic energy loss is studied by Fourier transformed infrared infrared(FTLR)spectra measurements.展开更多
Commercial available polyethyleneterephthalate(PET)films of about 15μm thickness and 42％crystallinity were irradiated witll 35 MeV/u^(40)Ar,25 MeV/u^(84)Kr,15.14 MeV/u^(136)Xe and 11.4 MeV/u^(238)U ions to fluences ...Commercial available polyethyleneterephthalate(PET)films of about 15μm thickness and 42％crystallinity were irradiated witll 35 MeV/u^(40)Ar,25 MeV/u^(84)Kr,15.14 MeV/u^(136)Xe and 11.4 MeV/u^(238)U ions to fluences ranging from 9×10~9 to 5.5×10^(12) ions/cm^2.The radiation-induced changes in molecular and crystalline structurcs were investigated by Fourier-transform infrared(FTIR)spectroscopy and X-ray diffraction(XRD)展开更多
In this letter, let R+[0, ∞), Z+ be the set of all positive integers, （E,（?）, △） a Menger space, Ω the family of all nonempty.（?）-closed probabilistically bounded sets. Let A, B（?） Ω, x（?） E, we denote ...In this letter, let R+[0, ∞), Z+ be the set of all positive integers, （E,（?）, △） a Menger space, Ω the family of all nonempty.（?）-closed probabilistically bounded sets. Let A, B（?） Ω, x（?） E, we denote by （?）A,B the Menger-Hausdorff metric induced by,（?）, by Fx.A the probabilistic distance between point x and set A.展开更多
文摘Stacked polymide(PI)filns of abou 25μm in thickness were irradiated with 1.755 GeV Xenon ions under vacuum and at room temperature.The chemical changes of modified PI films were studied by Fourier Transfbrm Infrared(FTIR)spectroscopy.The IR spectra corresponding to pristine and Xe ions irradiated(1st layer
文摘Swift heavy ions in matter lose energy mainly through electronic processes.Since the energy deposition is centered in a very small region with a very high energy density,new effects such as production of alkyne end group can be induced.In this work,PET,PS,PC and PI films are irradiated with Ar,Kr,Xe and U ions and the relationship of the alkyne end group production with electronic energy loss is studied by Fourier transformed infrared infrared(FTLR)spectra measurements.
文摘Commercial available polyethyleneterephthalate(PET)films of about 15μm thickness and 42％crystallinity were irradiated witll 35 MeV/u^(40)Ar,25 MeV/u^(84)Kr,15.14 MeV/u^(136)Xe and 11.4 MeV/u^(238)U ions to fluences ranging from 9×10~9 to 5.5×10^(12) ions/cm^2.The radiation-induced changes in molecular and crystalline structurcs were investigated by Fourier-transform infrared(FTIR)spectroscopy and X-ray diffraction(XRD)
文摘In this letter, let R+[0, ∞), Z+ be the set of all positive integers, （E,（?）, △） a Menger space, Ω the family of all nonempty.（?）-closed probabilistically bounded sets. Let A, B（?） Ω, x（?） E, we denote by （?）A,B the Menger-Hausdorff metric induced by,（?）, by Fx.A the probabilistic distance between point x and set A.
