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Auger Neutralization of Slow Protons at Solid Surfaces
Author(s) -
Horiguchi S.,
Koyama K.,
Ohtsuki Y. H.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220870242
Subject(s) - auger , proton , atomic physics , radius , bohr radius , bohr model , chemistry , solid angle , physics , nuclear physics , optics , quantum mechanics , computer security , computer science , electron , detector
Auger neutralization of slow protons (⪅ a few keV) scattered from solid surfaces is considered. The neutralïzation probability per unit time P(s) is calculated as a function of the proton distance s from the surface to P(s) = A {e −2x s + ( Bs + C ) e −(x+ a 0 −1 ) s+ ( Ds 2 + Es + F ) e −2 a 0 −1 s }, where a 0 is the Bohr radius and A, B, C, D, E, F , and x proper constants depending on the target. At large distances from the surface, the second and third terms of P(s) can be neglected. As the proton approaches the surface, however, P(s) deviates from the simple exponential dependence of s. The neutral fraction φ 0 is also calculated. From the obtained φ 0 , it is shown that Auger neutralization is important, at least in the low energy region.