A note on the purity of liquid helium-4.

Jewell, C. and McClintock, Peter V. E. (1979) A note on the purity of liquid helium-4. Cryogenics, 19 (11). p. 682. ISSN 0011-2275

Abstract

The purity of liquid He4 which may be achieved in practice is of considerable topical interest because of its potential use in connection with neutron confinement experiments. In this brief note, we extend the discussion of purity contained in an earlier paper by estimating an upper limit for the concentration of potential contaminants dissolved in the liquid.