The geyser effect in the vacuum expansion of solid 3He0.544He0.46 and the 
determination of the Poisson ratio

Nieto, Pablo; Benedek, Giorgio; Toennies, Jan Peter

doi:10.1088/1367-2630/14/1/013007

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The geyser effect in the vacuum expansion of solid ³He_0.54⁴He_0.46 and the determination of the Poisson ratio

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Benedek, Giorgio
Emeritus Group Molecular Interactions, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Toennies, Jan Peter
Emeritus Group Molecular Interactions, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Nieto, P., Benedek, G., & Toennies, J. P. (2012). The geyser effect in the vacuum expansion of solid ³He_0.54⁴He_0.46 and the determination of the Poisson ratio. New Journal of Physics, 14: 013007. doi:10.1088/1367-2630/14/1/013007.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-1115-6

Abstract

Periodic bursts, also called the geyser effect, previously observed in the vacuum expansion of pure and < 1% ³He-doped solid ⁴He, are shown to occur also in solid ³He-⁴He alloys. Results are reported for ³He_0.54 ⁴He_0.46 for the temperature range of 1.73-2.13 K and pressures up to 92 bar, and then compared with the results for pure solid ⁴He. The geyser period is found to increase with pressure much faster in the mixed solid than in pure solid ⁴He. A direct measurement of the internal pressure exerted on the lateral walls of the source chamber provides the first information on the Poisson ratio of polycrystalline pure and mixed solids.