Solvate Molecule Effects and Unusual57Fe Mössbauer Line Broadening in the Valence Detrapping of Mixed-Valence [Fe3O(O2CCH3)6(3-Et-py)3]·S

1996 ◽  
Vol 35 (14) ◽  
pp. 4137-4147 ◽  
Author(s):  
Chi-Cheng Wu ◽  
Ho Gyeom Jang ◽  
Arnold L. Rheingold ◽  
Philipp Gütlich ◽  
David N. Hendrickson
Keyword(s):  
Mixed Valence ◽  
Line Broadening ◽  
Solvate Molecule

Heisenberg and double exchange in iron mixed valence [Fe6S6]+ supercluster

1997 ◽  
Vol 90 (3) ◽  
pp. 445-463 ◽  
Author(s):  
M. CZERWINSKI ◽  
J. DĄBROWSKI
Keyword(s):  
Mixed Valence ◽  
Double Exchange

Theory for the mixed-valence state

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-374-C5-374 ◽  
Author(s):  
C. M. Varma
Keyword(s):  
Valence State ◽  
Mixed Valence ◽  
Mixed Valence State

MIXED VALENCE STATE OF Sm ON THE SURFACE OF AMORPHOUS La80-xSmxAu20 ALLOYS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-799-C8-802 ◽  
Author(s):  
G. Krill ◽  
A. Amamou ◽  
A. Berrada ◽  
J. Durand ◽  
N. Hassanain
Keyword(s):  
Valence State ◽  
Mixed Valence ◽  
Mixed Valence State

PHONONS IN MIXED VALENCE COMPOUNDS

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-3-C6-10 ◽  
Author(s):  
W. Kress ◽  
H. Bilz ◽  
G. Güntherodt ◽  
A. Jayaraman
Keyword(s):  
Mixed Valence ◽  
Mixed Valence Compounds

Vibronic Localization of the Electronic Pair in Polynuclear Mixed-Valence Polyoxometalates*

1996 ◽  
Vol 1 (1) ◽  
pp. 463-470
Author(s):  
J. J. Borrás-Almenar ◽  
J. M. Clemente ◽  
E. Coronado ◽  
B. S. Tsukerblat ◽  
A. V. Palii
Keyword(s):  
Mixed Valence

Nondestructive Inspection of Thin, Low-Z Samples using Multiplexed Compton Scatter Tomography

1997 ◽  
Vol 503 ◽  
Author(s):  
B. L. Evans ◽  
J. B. Martin ◽  
L. W. Burggraf
Keyword(s):  
Signal To Noise Ratio ◽  
Reconstruction Algorithm ◽  
Filtered Backprojection ◽  
Line Broadening ◽  
Compton Scatter ◽  
X Ray ◽  
Tomography System ◽  
Transmission Computed Tomography ◽  
High Purity Germanium ◽  
Scattered Energy

ABSTRACTThe viability of a Compton scattering tomography system for nondestructively inspecting thin, low Z samples for corrosion is examined. This technique differs from conventional x-ray backscatter NDI because it does not rely on narrow collimation of source and detectors to examine small volumes in the sample. Instead, photons of a single energy are backscattered from the sample and their scattered energy spectra are measured at multiple detector locations, and these spectra are then used to reconstruct an image of the object. This multiplexed Compton scatter tomography technique interrogates multiple volume elements simultaneously. Thin samples less than 1 cm thick and made of low Z materials are best imaged with gamma rays at or below 100 keV energy. At this energy, Compton line broadening becomes an important resolution limitation. An analytical model has been developed to simulate the signals collected in a demonstration system consisting of an array of planar high-purity germanium detectors. A technique for deconvolving the effects of Compton broadening and detector energy resolution from signals with additive noise is also presented. A filtered backprojection image reconstruction algorithm with similarities to that used in conventional transmission computed tomography is developed. A simulation of a 360–degree inspection gives distortion-free results. In a simulation of a single-sided inspection, a 5 mm × 5 mm corrosion flaw with 50% density is readily identified in 1-cm thick aluminum phantom when the signal to noise ratio in the data exceeds 28.

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