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Transmittance and optical constants of Ce films in the 6-1200 eV spectral range (Articolo in rivista)

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Transmittance and optical constants of Ce films in the 6-1200 eV spectral range (Articolo in rivista) (literal)

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Fernandez-Perea, M (1); Aznarez, JA (1); Larruquert, JI (1); Mendez, JA (1); Poletto, L (2); Garoli, D (2); Malvezzi, AM (3); Giglia, A (4); Nannarone, S (4) (2008)
Transmittance and optical constants of Ce films in the 6-1200 eV spectral range
in Journal of applied physics; American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
(literal)

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Fernandez-Perea, M (1); Aznarez, JA (1); Larruquert, JI (1); Mendez, JA (1); Poletto, L (2); Garoli, D (2); Malvezzi, AM (3); Giglia, A (4); Nannarone, S (4) (literal)

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(1) Inst Fis Aplicada Consejo Super Invest Cinetifica, Madrid 28006, Spain; (2)CNR, Ist Nazl Fis Mat, I-35100 Padua, Italy; (3) Univ Pavia, Dipartimento Elettr, I-127100 Pavia, Italy;Ist Nazl Fis Nucl, I-127100 Pavia, Italy; (4) CNR, INFM, Lab TASC, I-134012 Trieste, Italy (literal)

Titolo

Transmittance and optical constants of Ce films in the 6-1200 eV spectral range (literal)

Abstract

The optical constants of Ce films were obtained in the 6-1200 eV range from transmittance measurements obtained at room temperature. Thin films of Ce were deposited by evaporation in ultrahigh vacuum conditions and their transmittance was measured in situ. Ce films were deposited onto grid-supported, thin C films. Transmittance measurements of various film thicknesses were used to obtain the extinction coefficient k of Ce films at each individual photon energy investigated. The refractive index n of Ce was calculated with the Kramers-Kronig analysis using the current k data, which were extended toward smaller and larger energies with available data from literature and extrapolations. Ce has a low-absorption band right below O-2,O-3 edge, with lowest absorption at 16.1 eV. This makes Ce a promising material for the development of new filters and multilayer coatings below Ce O-2,O-3 edge, in which few developments have been performed due to the lack of low-absorption materials. A good consistency of the data was evaluated through f and inertial sum rules. (literal)

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