Abstract
Elastic recoil detection (ERD) has been successfully applied to the measurement of hydrogen and deuterium electromigration in metals. Besides providing a sensitive and direct measure of hydrogen isotope concentrations in the direction of transport, advantages over other techniques include excellent spatial resolution and the ability to distinguish between surface and bulk effects. Using incident 4He ions to determine the lateral redistribution of hydrogen due to the presence of a large electric current, we have measured the effective charge Z ∗ of H in α-Nb, Ta, and Ti under various conditions. We also demonstrate the simultaneous determination of Z ∗ of H and D in α-V. Data analysis methods and sample preparation are discussed.
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