Abstract
Hydrogen and deuterium atoms trapped in impurity-helium condensates (IHCs) formed by condensing krypton, hydrogen, and deuterium atoms in superfluid 4He were studied with pulse electron spin resonance. We have used electron spin echo envelope modulation (ESEEM) to probe the magnetic interactions between atoms of hydrogen isotopes and 83Kr nuclei. Modeling of the ESEEM spectra suggests that the vast majority of the hydrogen and deuterium atoms reside at the surface of the Kr clusters. This conclusion is in agreement with that from continuous wave ESR experiments with IHCs of similar composition.
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