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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.citation	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.identifier.uri	http://hdl.handle.net/10550/12908
dc.description.abstract	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_US
dc.language.iso	en	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	journal article	es_ES
dc.subject.unesco	UNESCO::FÍSICA	en
dc.identifier.doi	10.1063/1.351983	en
dc.type.hasVersion	VoR	es_ES
dc.identifier.url	http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JAPIAU000072000011005423000001&idtype=cvips&prog=normal&doi=10.1063/1.351983	en