Open AccessThe geyser effect in the vacuum expansion of solid3He0.544He0.46and the determination of the Poisson ratio
Author(s) -
P. Nieto,
G. Benedek,
J. P. Toennies
Publication year - 2012
Publication title -
new journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.584
H-Index - 190
ISSN - 1367-2630
DOI - 10.1088/1367-2630/14/1/013007
Subject(s) - physics , poisson distribution , atomic physics , isotopes of helium , nuclear physics , helium , statistics , mathematics
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 3He0.54 4He0.46 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