Desorption of protons from Ni and oxidized Ni surfaces with positron-induced ion-desorption spectroscopy

Terashima, Y.; Arai, Reiko; Wada, T.; Kanazawa, I.; Ito, Yuki; Fukutani, Katsuyuki; Murata, Yoshitada; Komori, Fumio

doi:10.1016/s0169-4332(02)00133-2

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“…In addition, the recent studies with positron-annihilation induced Auger electron spectroscopy (PAES) [2] and reflection high-energy positron diffraction (RHEPD) [3,4] demonstrate that low-energy positron is a strongly sensitive probe for detecting adsorbed atoms on the surface. Thus, positron-induced ion-desorption spectroscopy will provide important information on the desorption mechanism [5,6].…”

Section: Introductionmentioning

confidence: 99%

Adsorbed Hydrogen Effect of Reemitted Slow Positrons from Ni Surface

Wada¹,

Oishi²,

Kanazawa

et al. 2004

MSF

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Positron-induced ion-desorption spectroscopy has been constructed and used for measurements of positron-induced hydrogen ion desorption from Ni surfaces. The number of reemitted positrons from hydrogen adsorbed Ni surface is fewer than that for a clean Ni surface. We think that the effect might be related to the interaction between adsorbed hydrogen on the Ni surface and thermalized positrons which diffuse back to the surface.

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