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Observation of Crossover from Ballistic to Diffusion Regime for Excimer Molecules in Superfluid 4He

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An Erratum to this article was published on 10 October 2012

Abstract

We have measured the temperature dependence of the time of flight of helium excimer molecules \(\mathrm {He}_{2}^{*}(a^{3}\Sigma ^{+}_{u})\) in superfluid 4He and find that the molecules behave ballistically below ∼100 mK and exhibit Brownian motion above ∼200 mK. In the intermediate temperature range the transport cannot be described by either of the models.

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Acknowledgements

This work was supported through the Materials World Network program by the Engineering and Physical Sciences Research Council [Grant No. EP/H04762X/1] and the National Science Foundation [Grants DMR-1007937 and DMR-1007974]. PMW is indebted to EPSRC for the Career Acceleration Fellowship [Grant No. EP/I003738/1].

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Authors and Affiliations

  1. School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UK

    D. E. Zmeev, F. Papkour, P. M. Walmsley & A. I. Golov

  2. Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK

    D. E. Zmeev, P. V. E. McClintock & S. N. Fisher

  3. Department of Physics, Yale University, P.O. Box 208120, New Haven, CT, 06520-8120, USA

    W. Guo & D. N. McKinsey

  4. Department of Physics, University of Florida, P.O. Box 118440, Gainesville, FL, 32611-8440, USA

    G. G. Ihas

  5. School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK

    W. F. Vinen

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  1. D. E. Zmeev
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  2. F. Papkour
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  3. P. M. Walmsley
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  4. A. I. Golov
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  5. P. V. E. McClintock
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  6. S. N. Fisher
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  7. W. Guo
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  8. D. N. McKinsey
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  9. G. G. Ihas
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  10. W. F. Vinen
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Correspondence to D. E. Zmeev.

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Zmeev, D.E., Papkour, F., Walmsley, P.M. et al. Observation of Crossover from Ballistic to Diffusion Regime for Excimer Molecules in Superfluid 4He. J Low Temp Phys 171, 207–213 (2013). https://doi.org/10.1007/s10909-012-0720-6

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  • DOI: https://doi.org/10.1007/s10909-012-0720-6

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