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Long term stability of H atoms in HD-D2-He solids

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We employed en electron spin resonance (ESR) technique for investigating the long term behavior of hydrogen and deuterium atoms in the HD-D2 impurity helium solids that were created by sending a gas mixture [H2]:[D2]:[He]= 1:4:100 through a radio-frequency electrical discharge into a volume of superfluid 4He at T = 1.5 K. H and D atoms were stabilized inside nanoclusters of impurity molecules. The exchange tunneling reactions D + H2 → HD + H and D + HD→D2 + H proceeded to eliminate D atoms and increase the concentration of H atoms in the HD-D2 impurity-helium solids. Local concentrations of H atoms inside the molecular nanoclusters of order 1020 cm−3 were achieved. The high concentration of H atoms was stable during ∼ 40 hours storage of the sample at T = 1.35 K. These solids are possible candidates for collective quantum phenomena of atomic hydrogen if the Bose-Einstein degeneracy regime can be attained.

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Authors and Affiliations

  1. Laboratory of Atomic and Solid State Physics, Cornell University, 14853, Ithaca, NY, USA

    E.P. Bernard, V.V. Khmelenko & D.M. Lee

  2. Branch of Institute of Energy Problems of Chemical Physics, 142432, Chernogolovka, Moscow region, Russia

    R.E. Boltnev

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  1. E.P. Bernard
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  2. R.E. Boltnev
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  3. V.V. Khmelenko
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  4. D.M. Lee
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PACS numbers: 61.46. +w, 67.40.Yv, 76.30.−v.

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Bernard, E., Boltnev, R., Khmelenko, V. et al. Long term stability of H atoms in HD-D2-He solids. J Low Temp Phys 138, 829–834 (2005). https://doi.org/10.1007/s10909-005-2310-3

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  • DOI: https://doi.org/10.1007/s10909-005-2310-3

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