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Studies of E.s.r. Linewidths in Coals and Related Materials.

Authors
Retcofsky-HL; Thompson-GP; Raymond-R; Friedel-RA
Source
Fuel 1975 Apr; 54:126-128
Link
NIOSHTIC No.
10009579
Abstract
An investigation was carried out to explore the importance of two line-broadening mechanisms that may be responsible for the width of the electron spin resonance (e.S.R.) Signals exhibited by coals. Studies of catalytically dehydrogenated coals, isotopically substituted low-temperature chars, and a large number of vitrains from coals of all ranks support the view that electron-nuclear hyperfine interactions produce significant contributions to the e.S.R. Linewidths found for low-rank coals. Anisotropic g-values appear to be relatively unimportant for low-rank coals, but measurements made on oriented sections of young anthracite coals revealed a small but reproducible anisotropy in the e.S.R. G tensor.
Publication Date
19750401
Document Type
OP;
Fiscal Year
1975
NTIS Accession No.
NTIS Price
Identifying No.
OP 48-75
NIOSH Division
PERC;
Source Name
Fuel, V. 54, April 1975, PP. 126-128
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