McClintock, Peter V. E. (1978) An apparatus for preparing isotopically pure 4He. Cryogenics, 18 (4). pp. 201-208. ISSN 0011-2275
Full text not available from this repository.Abstract
A cryostat has been constructed for extracting pure He4 from He II of natural isotopic composition by means of a heat flush technique. It is shown that the method is in principle capable of yielding He4 which is entirely devoid of He3 isotopic impurities. A secondary heat flush, operated in conjunction with a conical heat exchanger of novel design, was used to place an experimental lower bound of 2 × 1015 on the ratio of the product, a standard sufficient for all present or projected applications requiring isotopically pure He4. The apparatus produces 2 000 1 (at standard temperature and pressure) of He4 per thermal cycle. The design of future purifiers is discussed.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Cryogenics |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 32504 |
| Deposited By: | Professor P. V. E. McClintock |
| Deposited On: | 12 Apr 2010 10:21 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 17:11 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/32504 |
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