Direct Transition Exciton and Fine Structure of the Magneto-Absorption Spectrum in Germanium

1958 ◽  
Vol 109 (6) ◽  
pp. 2207-2209 ◽  
Author(s):  
Solomon Zwerdling ◽  
Laura M. Roth ◽  
Benjamin Lax
Keyword(s):  
Absorption Spectrum ◽  
Fine Structure ◽  
Direct Transition

X-Ray Absorption Fine Structure Study in FeTiO3

1997 ◽  
Vol 11 (16n17) ◽  
pp. 745-748 ◽  
Author(s):  
Rebekah Min-Fang Hsu ◽  
Kai-Jan Lin ◽  
Cheng Tien ◽  
Lin-Yan Jang
Keyword(s):  
Absorption Spectrum ◽  
Fine Structure ◽  
Absorption Spectra ◽  
Mixed Valence ◽  
Structure Study ◽  
X Ray ◽  
Xafs Spectroscopy ◽  
Absorption Fine ◽  
Trivalent State ◽  
X Ray Absorption

X-ray absorption fine structure XAFS spectroscopy has been used to determine the valence system for the Fe atom in ilmenite, FeTiO3 . This is the first XAFS data in FeTiO3 to our knowledge. The α- Fe2O3 data served as the standard in determining the ionization of the Fe atom in FeTiO3 . Observation of intensity and k-space are consistent. There was no evidence of mixed valence on comparing the FeTiO3 near edge X-ray absorption spectrum with α- Fe2O3 data. The absorption spectra suggest that iron is in the trivalent state in ilmenite.

The experimental electronic and vibrational spectra of fulvene

1970 ◽  
Vol 23 (9) ◽  
pp. 1707 ◽  
Author(s):  
RD Brown ◽  
PJ Domaille ◽  
JE Kent
Keyword(s):  
Absorption Spectrum ◽  
Fine Structure ◽  
Gas Phase ◽  
Energy Transition ◽  
Liquid Nitrogen Temperature ◽  
Electronic Transitions ◽  
Mo Calculations ◽  
Polycrystalline Layer ◽  
Partial Analysis ◽  
Electronic And Vibrational Spectra

The infrared spectrum of fulvene has been observed from 250 to 4000 cm-1 in the gas phase, and as a glass and a polycrystalline layer at liquid nitrogen temperature. On the basis of gas-phase contours and P-R separations 14 of the 30 fundamental vibrations have been assigned. The electronic absorption spectrum of fulvene has been recorded from 400 to 167 nm in the gas phase and four electronic transitions have been identified. The lowest-energy transition was found to be broad and structureless while the three higher-energy transitions showed an extensive vibrational fine structure. The electronic transitions have been tentatively assigned on the basis of VESCF-MO calculations and a partial analysis of the vibronic structure has bees made.

Assignment of fine structure in the HBr absorption spectrum at the Br3d→Rydberg resonances using the Auger resonant Raman effect

1997 ◽  
Vol 56 (5) ◽  
pp. R3342-R3345 ◽  
Author(s):  
Y. F. Hu ◽  
G. M. Bancroft ◽  
J. Karvonen ◽  
E. Nommiste ◽  
A. Kivimaki ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Fine Structure ◽  
Raman Effect ◽  
Resonant Raman

Absorption Spectrum of Mn2+ Ions Doped in Zinc Thallium Sulphate Hexahydrate

1989 ◽  
Vol 44 (1) ◽  
pp. 19-22
Author(s):  
J. Lakshmana Rao ◽  
M. Ramachandra Reddy ◽  
S. V. J. Lakshman
Keyword(s):  
Absorption Spectrum ◽  
Fine Structure ◽  
Optical Absorption ◽  
Liquid Nitrogen ◽  
Ground State ◽  
Optical Absorption Spectrum ◽  
Orbit Interaction ◽  
Spin Orbit ◽  
Octahedral Symmetry ◽  
Spin Orbit Interaction

Abstract The optical absorption spectrum of Mn2+ ions doped in zinc thallium sulphate hexahydrate has been studied at room and liquid nitrogen temperatures. The observed bands are assigned as transitions from the 6A1g(S) ground state to various excited quartet levels of Mn2+ ion in octahedral symmetry. The fine structure observed in the 4T2g(D) band is explained as due to spin-orbit interaction. All the observed band positions have been fitted with the parameters B, C, Dq and α .

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