ESR and X-ray investigations of deuterium atoms and molecules in impurity-helium solids

Ethan P. Bernard, Roman E. Boltnev, Vladimir V. Khmelenko, V. Kiryukhin, S. I. Kiselev, David M. Lee

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14 Scopus citations

Abstract

Impurity-helium solids created by injecting deuterium atoms and molecules into superfluid 4He have been studied via electron spin resonance (ESR) and x-ray diffraction methods. We measured the g-factor, the hyperfine constant and the spin-lattice relaxation time of D atoms in D-D2-He solids. These measurements show that D atoms are mainly stabilized in D2 clusters. Using an x-ray method we found the size of D2 clusters to be ∼ 90 Å in diameter and the densities of D2 molecules in the samples to be of order 2.5 · 1021 cm-3. The highest average concentration of D atoms achieved in D-D2-He solids was ∼ 1.5 · 1018 cm-3. The local concentrations of D atoms within D2 clusters is found to be large (∼ 2 · 1019 cm-3).

Original languageEnglish (US)
Pages (from-to)169-174
Number of pages6
JournalJournal of Low Temperature Physics
Volume134
Issue number1-2
DOIs
StatePublished - Jan 2004

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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