Radiant energy – Electron energy analysis
Patent
1993-03-08
1995-01-10
Dzierzynski, Paul M.
Radiant energy
Electron energy analysis
250306, 250307, 250309, 250287, H01J 3726
Patent
active
053810031
ABSTRACT:
A pulsed positron beam capable of annihilating with electrons in an element to induce an Auger emission process is applied in a sample, the flight time t of a number of electrons including an Auger electron emitted from a surface of the sample fly from the sample over a predetermined distance d is measured, the velocity distribution of the emitted electrons is determined from the distance d and the time t, the energy distribution of the emitted electron is determined from the velocity distribution, and the peak of the emitted Auger electron is measured from the obtained energy distribution to analyze the bonding condition of elements of the sample surface with a high precision.
REFERENCES:
patent: 4486659 (1984-12-01), Turner
patent: 4740694 (1988-04-01), Nishimura et al.
patent: 5159195 (1992-10-01), Van House
Physical Review B, vol. 43, No. 13, May 1st, 1991, "Positron--induced Auger--electron Study Of The Ge(100) Surface: Positron Thermal Desorption and Surface Condition", E. Soininen et al., pp. 10051-10061.
Alex Weiss et al, "Positron annihilation induced Auger electron spectroscopy and its implementation at accelerator based low energy positron factories" Nuclear Instruments and Methods in Physics Research B56/57, 1991, pp. 591-594.
R. Mayer et al, "Temperature dependence of low-energy positron--induced Auger--electron emission: Evidence for high surface sensitivity", Physical Review B, vol. 42, No 4, Aug. 1990, pp. 1881-1884.
A. Weiss et al, "Auger--Electron Emission Resulting from the Annihilation of Core Electrons with Low--Energy Positrons", Physical Review Letters, vol. 61, No. 19, Nov. 7th, 1988, pp. 2245-2248.
Agency of Industrial Science & Technology
Dzierzynski Paul M.
Nguyen Kiet T.
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