ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract An accurate study of the nuclear molar susceptibility χ of liquid He 3 has been made. Particularly emphasized was the comparison of χ in the liquid with that in solid He 3 . The experimental results of this work define a three-dimensional surface χT/C versus temperatureT and molar volumeV between 0.35 and 2.2° K and between 26 and 37 cm 3 /mole. HereC is the molar Curie constant of solid He 3 , assumed to beN A µ 2 /k B T, where μ is the nuclear magnetic moment and N A Avogadro's number. The measurements were accomplished using a carefully designed pulsed NMR set, and sample-and-hold circuitry with a digital voltmeter for readout. Most of the measurements were made at fixed temperature relative to a sample of bcc solid He 3 , usually at a density of 22.50 cm 3 /mole. These data were complemented by measurement of χ versusT at fixed pressure. Except at the highest temperatures, the scatter in the values was about 0.3%, and the results are estimated to be accurate within ±0.5%. At sufficiently high temperatures, the susceptibility is found to tend asymptotically towards Curie's law by comparison with solid He 3 . The deviation from Curie's law, to temperatures near 0.5° K, could be empirically written as (1−χT/C)=bT d whereb andd are density-dependent parameters. Comparison with theories and previous measurements of the nuclear susceptibility are made. Below 1° K, the present results are about midway between those of Beal and Hatton 9 and those of Thomson, Meyer, and Adams. 8
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00628272
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