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Solubility of helium in metallic hydrogen

Stevenson, D. J. (1979) Solubility of helium in metallic hydrogen. Journal of Physics F: Metal Physics, 9 (5). pp. 791-801. ISSN 0305-4608. doi:10.1088/0305-4608/9/5/007.

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In the low-pressure limit, a helium atom embedded in the electron gas appropriate to metallic hydrogen is only weakly perturbed from its free space structure, and its interaction with the electron gas can be represented by an energy-dependent pseudopotential. A calculation is made for the Gibbs energy of mixing for H-He, using an Austin pseudopotential and a fluid state model based on hard-sphere structure factors. A large orthogonalisation hole is predicted, which may crudely represent the gradual transition from a helium atom to a screened alpha -particle as the electron density increases. The helium solubility is predominantly determined by the structure-independent interaction of the electron gas with the repulsive pseudopotential, and is probably least at the lowest pressures. In the hydrogen-helium planets (Jupiter, Saturn) the helium concentration may be at or close to saturation at the molecular-metallic hydrogen transition.

Item Type:Article
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Stevenson, D. J.0000-0001-9432-7159
Additional Information:© 1979 The Institute of Physics. Received 31 July 1978, in final form 18 December 1978. I acknowledge the useful comments and criticisms of E L Pollock and B J Alder of the Lawrence Livermore Laboratory.
Issue or Number:5
Classification Code:PACS: 64.75.-g; 71.22.+i; 71.15.Dx; 65.20.-w; 71.10.Ca
Record Number:CaltechAUTHORS:20130612-105554690
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Official Citation:Solubility of helium in metallic hydrogen D J Stevenson 1979 J. Phys. F: Met. Phys. 9 791
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38912
Deposited By: Tony Diaz
Deposited On:12 Jun 2013 21:57
Last Modified:12 Jul 2022 19:52

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