Valence bands of poly(methylmethacrylate) and photoion emission in vacuum ultraviolet region
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Valence bands of poly(methylmethacrylate) and photoion emission in vacuum ultraviolet region

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Valence bands of poly(methylmethacrylate) and photoion emission in vacuum ultraviolet region

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dc.contributor.author Ueno, N.
dc.contributor.author Kobayashi, Y.
dc.contributor.author Sekiguchi, T.
dc.contributor.author Ikeura, H.
dc.contributor.author Sugita, K.
dc.contributor.author Honma, K.
dc.contributor.author Tanaka, K.
dc.contributor.author Ortí Guillén, Enrique
dc.contributor.author Viruela Martín, Rafael
dc.date.accessioned 2010-06-08T10:57:17Z
dc.date.available 2010-06-08T10:57:17Z
dc.date.issued 1992
dc.identifier.uri http://hdl.handle.net/10550/12908
dc.language.iso en en
dc.relation http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JAPIAU000072000011005423000001&idtype=cvips&prog=normal&doi=10.1063/1.351983 en
dc.source UENO, N. ; KOBAYASHI, Y. ; SEKIGUCHI, T. ; IKEURA, H. ; SUGITA, K. ; HONMA, K. ; TANAKA, K. ; ORTÍ, E. ; VIRUELA, R. Valence bands of poly(methylmethacrylate) and photoion emission in vacuum ultraviolet region. En: Journal of Applied Physics, 1992, vol. 72, no. 11 en
dc.subject Pmma ; Ion Emission ; Electron Emission ; Photoelectron Spectroscopy ; Ev Range 10−100 ; Valence Bands ; Band Structure en
dc.title Valence bands of poly(methylmethacrylate) and photoion emission in vacuum ultraviolet region en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::FÍSICA en
dc.identifier.doi 10.1063/1.351983 en
dc.description.abstractenglish Photoion and photoelectron yields were measured for poly(methylmethacrylate) in the photon energy region of 8–40 eV using synchrotron radiation. Further, the valence‐band structure was investigated with ultraviolet photoelectron spectra and valence effective Hamiltonian calculations. A significant difference was observed between the photon energy dependencies of photoion and photoelectron yields. The threshold energy for photoion emission was found to be 10.5 eV, while that for photoelectron emission was 8.5 eV, indicating holes created near the valence‐band top do not contribute to the ion emission. At the higher‐energy region, the ion emission efficiency was found to be enhanced in the photon energy region of 17–28 eV. The difference between the threshold energies of photoion and photoelectron emission and the enhancement of the photoion emission are discussed in conjunction with the valence‐band structure. en
dc.description.private Enrique.Orti@uv.es ; Rafael.Viruela@uv.es en

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