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Determination of the transmittance and extinction coefficient of Yb films in the 23-1700 eV range (Contributo in atti di convegno)

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Determination of the transmittance and extinction coefficient of Yb films in the 23-1700 eV range (Contributo in atti di convegno) (literal)

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Juan I. Larruquert (1); Mónica Fernández-Perea (1); José A. Aznárez (1); José A. Méndez (1); Luca Poletto (2); Denis Garoli (2); A. Marco Malvezzi (3); Angelo Giglia (4); Stefano Nannarone (4) (2006)
Determination of the transmittance and extinction coefficient of Yb films in the 23-1700 eV range
in Advances in X-Ray/EUV Optics, Components, and Applications, San Diego, CA, USA, 14 August 2006
(literal)

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Juan I. Larruquert (1); Mónica Fernández-Perea (1); José A. Aznárez (1); José A. Méndez (1); Luca Poletto (2); Denis Garoli (2); A. Marco Malvezzi (3); Angelo Giglia (4); Stefano Nannarone (4) (literal)

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(1)Instituto de Física Aplicada-Consejo Superior de Investigaciones Científicas Serrano 144, 28006 Madrid, Spain; (2) Istituto Nazionale per la Fisica della Materia-CNR & Dep. of Information Engineering, Padua, Italy; (3) Dipartimento di Elettronica, Università di Pavia and INFM, Via Ferrata, 1, I27100 Pavia, Italy; (4) TASC-INFM-CNR, s. s. 14, km 163.5 in Area Science Park, I-34012 Trieste, Italy (literal)

Titolo

Determination of the transmittance and extinction coefficient of Yb films in the 23-1700 eV range (literal)

Abstract

The transmittance of thin films of Yb deposited by evaporation in ultra high vacuum (UHV) conditions have been investigated in the 23-1,700 eV spectral range. Transmittance measurements were performed in situ on Yb films deposited over grids coated with a thin, C support film. Transmittance measurements were used to obtain the extinction coefficient of Yb films at each individual photon energy investigated. The energy range investigated encompasses M, N, and O edges of Yb. The current results, along with data in the literature, show that Yb has an interesting low-absorption band in the ~12-24 eV range. The promising characteristics of Yb as a filter material in this region requires the development of a protection material due to the reactivity of Yb under normal atmosphere. The low absorption of Yb in the above range makes it also a candidate for a component of multilayer coatings in a spectral region in which few developments have been performed due to the lack of low absorption materials. The f1 sum-rule was applied to extinction coefficient data in the whole spectrum that included the current data along with those of the literature, resulting in a value of 70.26, which is close to the expected value of 69.32. (literal)

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