dc.creator Brafman, O. en_US dc.creator Mitra, S. S. en_US dc.date.accessioned 2006-06-15T16:47:47Z dc.date.available 2006-06-15T16:47:47Z dc.date.issued 1968 en_US dc.identifier 1968-V-7 en_US dc.identifier.uri http://hdl.handle.net/1811/15600 dc.description Author Institution: Department of Electrical Engineering, University of Rhode Island en_US dc.description.abstract Stokes and anti-Stokes Raman spectra of green additively colored (with Ca) $SrF_{2}$ were recorded at $90^{\circ}K$ and $300^{\circ}K$ in the perpendicular scattering configuration using a He-Ne laser ($6328{\AA}$) as the excitation source. The spectrum consists of two parts. A relatively strong band appears at $284 cm^{-1}$ (at $300^{\circ}K$), which is also observed in pure $SrF_{2}$. This band is due to the first order Raman scattering by the $F_{1g}$ type mode at $k \sim O$. The rest of the spectrum consists of three bands at 117, 173 and $338 cm^{-1}$, and are not observed in pure $SrF_{2}$ crystals. These are assigned to the impurity induced (otherwise forbidden) critical point phonons corresponding to zone boundary TA, LA and LO respectively. en_US dc.format.extent 100869 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title RAMAN SCATTERING BY ADDITIVELY COLORED $SrF_{2}$ CRYSTALS en_US dc.type article en_US
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