Abstract
New features are observed for the pressure in a phase-separated dilute solid solution of 4He in 3He subjected to multiple temperature cycling within the phase-separation region. The results are explained within the framework of the hypothesis of A.F. Andreev and D.I. Pushkarov that the vacancies in a crystal without ideal periodicity are surrounded by clusters with a periodic structure. The equation for determining the radius of a cluster of pure 4He in a solution of 4He in 3He is refined. This hypothesis is shown to provide quantitative agreement between the calculated and experimental data under the assumption that the homogenization of the phase-separated solution is accompanied by the formation of metastable vacancies with a concentration of ∼(4–5)×10−5.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 73, No. 6, 2001, pp. 329–333.
Original Russian Text Copyright © 2001 by Ganshin, Grigor’ev, Ma\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \)danov, Penzev, Rudavski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Rybalko, Syrnikov.
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Ganshin, A.N., Grigor’ev, V.N., Maidanov, V.A. et al. Observation of Andreev-Pushkarov vacancy clusters in phase-separated solid solutions of 4He in 3He. Jetp Lett. 73, 289–293 (2001). https://doi.org/10.1134/1.1374263
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DOI: https://doi.org/10.1134/1.1374263