Interaction of Hydrogen Atoms with Helium Films: Sticking Probabilities for H onHe3andHe4, and the Binding Energy of H onHe3

Magnetic resonance at 1420 MHz in zero magnetic field and for $0.06<T<\mathrm{}0.5\mathrm{}$ K has been used to determine the binding energy of H on liquid ${}_{}{}^3{}_{}{}^{}\mathrm{He}$, the rate constant for recombination and the frequency shift for H on ${}_{}{}^3{}_{}{}^{}\mathrm{He}$, and the sticking probability for H on ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^4{}_{}{}^{}\mathrm{He}$. The binding energy for H on liquid ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ is found to be 0.42±0.05 K, and the sticking probabilities are 0.035 for H on ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ and 0.016 for H on ${}_{}{}^3{}_{}{}^{}\mathrm{He}$.