Optical absorption spectrum and energy levels of Pr3+ in Pr(ReO4)3 � 4 H2O single crystals

1969 ◽  
Vol 11 (6) ◽  
pp. 1483-1486
Author(s):  
K. I. Petrov ◽  
N. A. Orlin ◽  
V. E. Plyushchev
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Single Crystals ◽  
Optical Absorption Spectrum ◽  
Energy Levels

The anomalous optical absorption spectrum of low zircon

1974 ◽  
Vol 39 (306) ◽  
pp. 709-714 ◽  
Author(s):  
E. R. Vance
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Optical Absorption Spectrum ◽  
Magnetic Circular Dichroism ◽  
Energy Levels ◽  
Infra Red ◽  
Temperature Polarization ◽  
Polarization Studies ◽  
Normal Spectrum ◽  
The Magnetic Field

SummaryFurther lines of the anomalous optical absorption spectrum in low metamict zircon have been observed in the infra-red. Low-temperature polarization studies have enabled a clear distinction to be made between lines due to the anomalous spectrum and those due to the normal spectrum of U4+ in zircon. Magnetic circular dichroism measurements showed, for the anomalous spectrum, only contributions due to the mixing of the energy levels by the magnetic field; thus the A spectrum results from singlet → singlet transitions. The anomalous spectrum appears to derive from U4+ incorporated in polycrystalline zirconia.

Optical absorption spectrum of Co2+ in lithium ammonium sulphate single crystals

1983 ◽  
Vol 115 (1) ◽  
pp. K45-K50 ◽  
Author(s):  
S. Hari ◽  
K. Purandar ◽  
J. Lakshmana Rao ◽  
S. V. J. Lakshman
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Single Crystals ◽  
Ammonium Sulphate ◽  
Optical Absorption Spectrum

Optical absorption spectrum of tin diselenide single crystals

1976 ◽  
Vol 47 (3) ◽  
pp. 997-1000 ◽  
Author(s):  
A. K. Garg ◽  
O. P. Agnihotri ◽  
A. K. Jain ◽  
R. C. Tyagi
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Single Crystals ◽  
Optical Absorption Spectrum

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 411-413
Author(s):  
Yixing Zhao ◽  
Gordon R Freeman
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Temperature Dependence ◽  
Optical Absorption Spectrum ◽  
Infrared Light ◽  
Solvated Electron ◽  
Solvated Electrons ◽  
Tert Butanol ◽  
Solvent Dependence ◽  
Increasing Temperature

The energy and asymmetry of the optical absorption spectrum of solvated electrons, es- , change in a nonlinear fashion on changing the solvent through the series HOH, CH3OH, CH3CH3OH, (CH3)2CHOH, (CH3)3COH. The ultimate, quantum-statistical mechanical, interpretation of solvated electron spectra is needed to describe the solvent dependence. The previously reported optical spectrum of es- in tert-butanol was somewhat inaccurate, due to a small amount of water in the alcohol and to limitations of the infrared light detector. The present note records the remeasured spectrum and its temperature dependence. The value of the energy at the absorption maximum (EAmax) is 155 zJ (0.97 eV) at 299 K and 112 zJ (0.70 eV) at 338 K; the corresponding values of G epsilon max (10-22 m2 aJ-1) are 1.06 and 0.74. These unusually large changes are attributed to the abnormally rapid decrease of dielectric permittivity of tert-butanol with increasing temperature. The band asymmetry at 299 K is Wb/Wr = 1.8.Key words: optical absorption spectrum, solvated electron, solvent effects, tert-butanol, temperature dependence.

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