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Optical Constants of TlCl and TlBr with a Comparison of the Kramers-Kronig and "Two-Angle" Methods of Data Analysis

Optical Constants of TlCl and TlBr with a Comparison of the Kramers-Kronig and "Two-Angle"... The optical constants of TlCl and TlBr were determined in the region of 3 to 21 eV from reflectivity measurements. The low-energy measurements confirm the previous work of Zinngrebe. The high-energy structure is consistent with the available information on relative positions of atomic energy levels and with a plasma resonance associated with approximately 8 electrons per molecule. Both the "two-angle" and Kramers-Kronig methods were used in analyzing the data. The assumption of unpolarized radiation for a near-normal incidence monochromator can cause a considerable error in the results. The "two-angle" analysis is more sensitive to this error than the Kramers-Kronig technique, especially in the region of large values of n and k . When polarization effects are not important, the "two-angle" method gives results as good as or better than the Kramers-Kronig analysis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review American Physical Society (APS)

Optical Constants of TlCl and TlBr with a Comparison of the Kramers-Kronig and "Two-Angle" Methods of Data Analysis

Physical Review , Volume 159 (3) – Jul 15, 1967
6 pages

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Publisher
American Physical Society (APS)
Copyright
Copyright © 1967 The American Physical Society
ISSN
1536-6065
DOI
10.1103/PhysRev.159.711
Publisher site
See Article on Publisher Site

Abstract

The optical constants of TlCl and TlBr were determined in the region of 3 to 21 eV from reflectivity measurements. The low-energy measurements confirm the previous work of Zinngrebe. The high-energy structure is consistent with the available information on relative positions of atomic energy levels and with a plasma resonance associated with approximately 8 electrons per molecule. Both the "two-angle" and Kramers-Kronig methods were used in analyzing the data. The assumption of unpolarized radiation for a near-normal incidence monochromator can cause a considerable error in the results. The "two-angle" analysis is more sensitive to this error than the Kramers-Kronig technique, especially in the region of large values of n and k . When polarization effects are not important, the "two-angle" method gives results as good as or better than the Kramers-Kronig analysis.

Journal

Physical ReviewAmerican Physical Society (APS)

Published: Jul 15, 1967

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