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Ferrous/ferric Mossbauer analysis of simulated nuclear waste glass with and without computer fitting

Journal Article · · J. Am. Ceram. Soc.; (United States)
;

Wet-chemical and /sup 57/Fe Mossbauer analyses of ferrous/ferric ratios in complex borosilicate and simple silicate glasses were compared. The results support the validity of the colorimetric wet-chemical procedure and establish a linear calibration for the Mossbauer data. The resulting correlation indicates that using area ratios from Mossbauer spectra will overestimate the proportion of ferrous iron by a factor of 1.2. The linear calibration was achieved only after statistically optimizing the peak line shape for each Mossbauer spectrum. Samples with a greater proportion of ferrous iron tended to have a greater Gaussian contribution to the peak line shape. A procedure to determine ferrous/ferric ratios from measured intensity data at three velocity locations was developed. With instrument modification, this result will lead to a substantial reduction in data collection time and the elimination of complex spectral fitting.

Research Organization:
Battelle, Pacific Northwest Laboratory, Richland, WA
OSTI ID:
6128993
Journal Information:
J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 68:12; ISSN JACTA
Country of Publication:
United States
Language:
English

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Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
ABSORPTION SPECTROSCOPY
BOROSILICATE GLASS
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
DATA PROCESSING
DISTRIBUTION
EFFICIENCY
EVEN-ODD NUCLEI
FUNCTIONS
GAUSS FUNCTION
GLASS
INTERMEDIATE MASS NUCLEI
IRON 57
IRON COMPOUNDS
IRON ISOTOPES
ISOTOPES
MANAGEMENT
MOESSBAUER EFFECT
NUCLEI
PROCESSING
RADIOACTIVE WASTE PROCESSING
SIMULATION
SPECTROSCOPY
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS
VITRIFICATION
WASTE MANAGEMENT
WASTE PROCESSING