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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 10 — Apr. 1, 1998
  • pp: 1713–1719

Absolute photoabsorption measurements of molybdenum in the range 60–930 eV for optical constant determination

Regina Soufli and Eric M. Gullikson  »View Author Affiliations


Applied Optics, Vol. 37, Issue 10, pp. 1713-1719 (1998)
http://dx.doi.org/10.1364/AO.37.001713


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Abstract

Transmission measurements for the optical constants δ, β of the complex refractive index n = 1 - δ + iβ of molybdenum are performed in the energy range 60–930 eV. Free-standing C/Mo/C foils of five different thicknesses are used, and the results are normalized for the presence of the carbon layers in the samples. These absorption results are combined with previous experimental data in the lower energy range and values from the atomic tables to obtain the imaginary (absorptive) part of the refractive index for molybdenum in the range 1–30,000 eV. The real (dispersive) part of n was calculated from Kramers–Kronig analysis with the above absorption data. An evaluation with the partial sum rules demonstrates that this new compilation provides an improved set of values for n covering a wider energy range compared with the current tabulated values. The new results are applied so as to calculate the normal-incidence reflectivities of Mo/Si and Mo/Be multilayer mirrors.

© 1998 Optical Society of America

OCIS Codes
(040.7190) Detectors : Ultraviolet
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(230.4040) Optical devices : Mirrors
(230.4170) Optical devices : Multilayers

History
Original Manuscript: July 10, 1997
Revised Manuscript: November 5, 1997
Published: April 1, 1998

Citation
Regina Soufli and Eric M. Gullikson, "Absolute photoabsorption measurements of molybdenum in the range 60–930 eV for optical constant determination," Appl. Opt. 37, 1713-1719 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-10-1713

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