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Related Experiment Videos

Hydrogen atoms in impurity-helium solids.

S I Kiselev1, V V Khmelenko, D M Lee

  • 1Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501, USA.

Physical Review Letters
|October 26, 2002
PubMed
Summary

Electron spin resonance (ESR) studied atomic hydrogen and deuterium in helium solids. Researchers investigated tunneling reactions and potential applications for atomic hydrogen storage.

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Area of Science:

  • Quantum Chemistry
  • Solid-State Physics
  • Low-Temperature Physics

Background:

  • Atomic hydrogen and deuterium impurities can be stabilized in helium solids.
  • Understanding their behavior is crucial for quantum phenomena and potential applications.

Purpose of the Study:

  • To investigate the kinetics of low-temperature tunneling exchange reactions between hydrogen (H) and deuterium (D) in impurity-helium (Im-He) solids.
  • To explore the local environment of trapped atoms using ESR line structures.
  • To assess potential applications of stored atomic hydrogen.

Main Methods:

  • Electron Spin Resonance (ESR) spectroscopy was used to study H and D atoms in Im-He solids at 1.35-1.5 K.
  • Kinetics of tunneling exchange reactions (D+H2-->H+HD, D+HD-->H+D2) were analyzed in varying H/D mixtures.
  • ESR line structures were examined to understand the local atomic environment.

Main Results:

  • The study successfully employed ESR to probe atomic impurities in Im-He solids.
  • Kinetics of specific low-temperature tunneling reactions were investigated.
  • ESR line structures provided insights into the local environment of trapped H and D atoms.

Conclusions:

  • ESR is effective for studying atomic impurities in Im-He solids.
  • Tunneling reactions in these systems are amenable to kinetic studies.
  • High concentrations of atomic hydrogen in Im-He solids show promise for energy storage and spectroscopy.

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