A1 Refereed original research article in a scientific journal

Dynamic Nuclear Polarization of High-Density Atomic Hydrogen in Solid Mixtures of Molecular Hydrogen Isotopes




AuthorsS. Sheludiakov, J. Ahokas, J. Järvinen, D. Zvezdov, O. Vainio, L. Lehtonen, S. Vasiliev, S. Mao, V. V. Khmelenko, D. M. Lee

PublisherAmerican Physical Society

Publication year2014

JournalPhysical Review Letters

Journal acronymPRL

Article number265303

Volume113

Issue26

First page 265303-1

Last page265303-5

Number of pages5

ISSN0031-9007

DOIhttps://doi.org/10.1103/PhysRevLett.113.265303(external)


Abstract

We report on magnetic resonance studies of high-density atomic hydrogen and deuterium in solid hydrogen matrices at temperatures below 1 K. Average concentrations of H atoms ≈3 × 10 19 cm−3 are obtained in chemical tunneling reactions of isotope exchange with D atoms. The products of these reactions are closely located pairs of H atoms near D2 molecules with strong exchange interactions. We discovered a dynamic nuclear polarization effect on H atoms created by pumping the center of the H electron spin resonance spectrum, similar to the Overhauser effect in metals. Our results indicate that H atoms may be arranged inside molecular matrices at separations equivalent to local concentrations of 2 . 6 × 10 21 cm −3. This opens up a way to build a metallic state of atomic hydrogen at zero pressure.




Last updated on 2024-26-11 at 11:51