Transmittance and optical constants of Eu films from 8.3 to 1400 eV
- GOLD, Instituto de Fisica Aplicada, Consejo Superior de Investigaciones Cientificas, Serrano 144, 28006 Madrid (Spain)
- Department of Information Engineering, Istituto Nazionale per la Fisica della Materia-CNR, 35100 Padua (Italy)
- Dipartimento di Elettronica, Universita di Pavia and CNISM, Via Ferrata, 1, I27100 Pavia (Italy)
- Laboratorio TASC, INFM-CNR, S.S. 14, km 163.5 in Area Science Park, I-34012 Trieste (Italy)
The optical constants of Eu films were obtained in the 8.3-1400 eV range from transmittance measurements performed at room temperature. Thin films of Eu were deposited by evaporation in ultrahigh vacuum conditions and their transmittance was measured in situ. Eu films were deposited onto grids coated with a thin C support film. The refractive index n of Eu was calculated using the Kramers-Kronig analysis. Data were extrapolated both on the high- and low-energy sides by using experimental and calculated extinction coefficient values available in the literature. Eu, similar to other lanthanides, has a low-absorption band just below the O{sub 2,3} edge onset; the lowest absorption was measured at about 16.7 eV. Therefore, Eu is a promising material for filters and multilayer coatings in the energy range below the O{sub 2,3} edge in which materials typically have a strong absorption. The consistency of the composite optical constants was tested with the f and inertial sum rules and found to be good.
- OSTI ID:
- 21180050
- Journal Information:
- Journal of Applied Physics, Vol. 104, Issue 12; Other Information: DOI: 10.1063/1.2982391; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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