On the origin of electron stimulated desorption of H+ from metal surface |
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| Authors: | E Bauer H Poppa |
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| Institution: | Stanford/NASA Joint Institute for Surface and Microstructure Research, NASA-Ames Research Center, Moffett Field, California 94035, USA |
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| Abstract: | The emission of hydrogen ESD ions from polycrystalline Nb is studied experimentally. The results demonstrate clearly that no ESD emission of H+ occurs from a pure H adsorbate. However, adsorption of H2O, present as an impurity in H2, and H2 adsorption on Nb preceded by O adsorption, produce strong H+ ESD emission. It is shown that Auger ionization of O can account for the increased H+ yield and it is postulated that similar effects also occur on other metal surfaces. |
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