The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids
The stability and diffusion of protons and deuterons in rare gas matrices are reexamined. These are known to be stabilized in rare gas matrices in the form of linear, centrosymmetric Rg₂H⁺ cations. The elementary step in their diffusion, displacement from one Rg–Rg bond to a neighboring one, can be...
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| Datum: | 2003 |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2003
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| Zitieren: | The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids / M.K. Beyer, E.V. Savchenko, V.E. Bondybey // Физика низких температур. — 2003. — Т. 29, № 9-10. — С. 1045-1048. — Бібліогр.: 16 назв. — англ. |
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Beyer, M.K. Savchenko, E.V. Bondybey, V.E. 2018-01-14T13:07:59Z 2018-01-14T13:07:59Z 2003 The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids / M.K. Beyer, E.V. Savchenko, V.E. Bondybey // Физика низких температур. — 2003. — Т. 29, № 9-10. — С. 1045-1048. — Бібліогр.: 16 назв. — англ. 0132-6414 PACS: 47.45.-n, 63.50.+x, 66.30.Dn https://nasplib.isofts.kiev.ua/handle/123456789/128930 The stability and diffusion of protons and deuterons in rare gas matrices are reexamined. These are known to be stabilized in rare gas matrices in the form of linear, centrosymmetric Rg₂H⁺ cations. The elementary step in their diffusion, displacement from one Rg–Rg bond to a neighboring one, can be modelled as an isomerization of the triangular Rg₃H⁺ cation. Using an analytic approximation for thermally averaged transmission coefficients for tunnelling through and reflection by a truncated parabolic potential barrier (R.T. Skodje and D.G. Truhlar,J. Phys. Chem. 85, 624 (1981)) we calculate the rate constants for this elementary diffusion step. The calculated rate constants are consistent with all experimental observations, and confirm that tunnelling makes the dominant contribution to the diffusion of protons and deuterons in rare gas solids. Deuteration reduces the tunnelling rates by 5 to 8 orders of magnitude, which agrees with the observation that D⁺ in rare gas solids is signficantly more stable than H⁺. Financial support from the Deutsche Forschungsgemeinschaft through the program «Forderung der wissenschaftlichen Beziehungen deutscher Wissenschaftler zu Wissenschaftlern in Ländern Mittel- und Osteuropas sowie Ländern der vormaligen UdSSR» is gratefully acknowledged. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Low-Temperature Thermodynamics and Structure The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids Article published earlier |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids |
| spellingShingle |
The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids Beyer, M.K. Savchenko, E.V. Bondybey, V.E. Low-Temperature Thermodynamics and Structure |
| title_short |
The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids |
| title_full |
The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids |
| title_fullStr |
The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids |
| title_full_unstemmed |
The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids |
| title_sort |
contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids |
| author |
Beyer, M.K. Savchenko, E.V. Bondybey, V.E. |
| author_facet |
Beyer, M.K. Savchenko, E.V. Bondybey, V.E. |
| topic |
Low-Temperature Thermodynamics and Structure |
| topic_facet |
Low-Temperature Thermodynamics and Structure |
| publishDate |
2003 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
The stability and diffusion of protons and deuterons in rare gas matrices are reexamined. These are known to be stabilized in rare gas matrices in the form of linear, centrosymmetric Rg₂H⁺ cations. The elementary step in their diffusion, displacement from one Rg–Rg bond to a neighboring one, can be modelled as an isomerization of the triangular Rg₃H⁺ cation. Using an analytic approximation for thermally averaged transmission coefficients for tunnelling through and reflection by a truncated parabolic potential barrier (R.T. Skodje and D.G. Truhlar,J. Phys. Chem. 85, 624 (1981)) we calculate the rate constants for this elementary diffusion step. The calculated rate constants are consistent with all experimental observations, and confirm that tunnelling makes the dominant contribution to the diffusion of protons and deuterons in rare gas solids. Deuteration reduces the tunnelling rates by 5 to 8 orders of magnitude, which agrees with the observation that D⁺ in rare gas solids is signficantly more stable than H⁺.
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| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/128930 |
| citation_txt |
The contribution of tunnelling to the diffusion of protons and deuterons in rare gas solids / M.K. Beyer, E.V. Savchenko, V.E. Bondybey // Физика низких температур. — 2003. — Т. 29, № 9-10. — С. 1045-1048. — Бібліогр.: 16 назв. — англ. |
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| first_indexed |
2025-12-01T02:13:41Z |
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2025-12-01T02:13:41Z |
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