✦ LIBER ✦

S- and P-wave neutron spectroscopy. Part Xd: Intermediate structure, particle-vibration states: M. Divadeenam. North Carolina Central University and Triangle Universities Nuclear Laboratory, Durham, N. C. 27706, William P. Beres. Wayne State University, Detroit, Michigan 48202 and Henry W. Newson. Duke University and Triangle Universities Laboratory, Durham, N. C. 27706

Publisher: Elsevier Science
Year: 1973
Tongue: English
Weight: 47 KB
Volume: 80
Category: Article
ISSN: 0003-4916
DOI: 10.1016/0003-4916(73)90330-8

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✦ Synopsis

229

photon energy. In particular, the dominant scattering mechanism for small carrier concentrations is found to be polar optical mode scattering, which exhibits a X3 dependence of the absorption coefficient times the index of refraction, (except at the lowest frequencies, where the expected X2 dependence is obtained).

Ionic, or impurity, scattering becomes important as the carrier concentration is increased, and the characteristic wavelength dependence of the electron cross section times the index of refraction varies from h* to X3, and the absorption coefficient times the index of refraction from X4 to /\*, depending on the ratio of the photon energy to the initial electron energies.

Comparisons are made with the available data over a wide range of photon energies, temperatures, and electron concentrations, for the III-V compounds InSb, InAs, InP, and GaAs.

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