Interactions of hydrogen with magnetic and nonmagnetic surfaces☆

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Abstract

We report on recent measurements from two experiments in which we attempt to probe the electron-transfer process that occurs between a proton and a metallic solid. In a beam-tilted-foil experiment, we have observed an anomalous tilt-angle dependence of the circular polarization of Balmer-alpha radiation emitted following the transmission of low-energy protons through a thin carbon foil. This anomalous behavior is correlated with structure changes in the foil induced by the proton beam. In a grazing-incidence scattering experiment, we have made the first observation of quantum beats from the spin-polarized electron capture from Fe(11O). We have also measured the energy dependence of the circular polarization of Balmer-alpha radiation emitted following the grazing-incidence scattering of protons from a magnetized Fe(110) surface. Our results show that the contribution of the spin of the captured electrons to the observed circular polarization is constant over the energy range studied.

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Cited by (1)

  • Orientation of Na* atoms formed under grazing scattering at an Al surface

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☆

This work was supported in part by a grant from University Research Initiative of the Air Force Office of Scientific Research, contract numbers DASG60-86-C-0014 and F49620-86-ABC-0125.

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