Heat-capacity behavior of impure neptunium metal below 320°K

The experimentally determined low temperature C p vs. T curve of impure neptunium metal was found to exhibit irregular behavior. A small but persistent peak was found at about 85°K. The heat capacity data had considerable scatter between 75°K and 140°K, and a change of slope was found in the C p vs....

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 1965, Vol.26 (6), p.1075-1078
Main Author: Sandenaw, Thomas A.
Format: Article
Language:English
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Summary:The experimentally determined low temperature C p vs. T curve of impure neptunium metal was found to exhibit irregular behavior. A small but persistent peak was found at about 85°K. The heat capacity data had considerable scatter between 75°K and 140°K, and a change of slope was found in the C p vs. T curve at about 240°K. The effects noted were real and correlate with anomalies in resistivity and magnetic susceptibility observed by others; they exhibit some similarity to effects observed in α-U and α-Pu. It is felt that the observed behavior is intrinsic to the neptunium metal, and that results observed between 75°K and 140°K would be clearer cut in pure metal.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(65)90197-6