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Isotopic purification of He4.

Atkins, M. and McClintock, Peter V. E. (1976) Isotopic purification of He4. Cryogenics, 16 (12). pp. 733-734. ISSN 0011-2275

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Abstract

Isotopic purification of He4 is conventionally accomplished by 'filtration' through a superleak which may, for example, be of compressed rouge or of Vicor glass. An intrinsic limitation of this procedure is that a small fraction of the He3 isotopic impurities passes through along with the superfluid He4, the exact proportion depending on the pore size of the superleak itself. In this note we describe a simple refinement of the technique, by which samples of very much higher purity may be prepared and in which the quality of the superleak is relatively unimportant. Our method exploits the well-known phenomenon of heat flush to remove He3 atoms from the vicinity of the superleak.

Item Type: Article
Journal or Publication Title: Cryogenics
Subjects: ?? qc ??
Departments: Faculty of Science and Technology > Physics
ID Code: 32515
Deposited By: Professor P. V. E. McClintock
Deposited On: 12 Apr 2010 12:05
Refereed?: Yes
Published?: Published
Last Modified: 30 Aug 2017 12:56
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/32515

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