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Dive into the research topics where Wu-Chi Chen is active.

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Featured researches published by Wu-Chi Chen.


Radiation Physics and Chemistry | 2003

Study of ultra-thin Al films deposited on GaAs(100) using positron annihilation induced auger electron spectroscopy and electron induced auger electron spectroscopy

Wu-Chi Chen; Nail G. Fazleev; A.H. Weiss

Abstract We report study of the stability of ultra-thin Al films deposited on GaAs(100) using positron annihilation induced Auger electron spectroscopy (PAES). After the sample was kept for 7 days at 300 K under UHV conditions, the normalized Al PAES intensity decreased by 33.7±4.6%. Over the same time period, the normalized Ga PAES intensity increased by 55.8±4.8%. PAES spectra provide a direct method of confirming the substitution of Ga for Al in the top layer and Ga diffuse into the Al overlayer faster than As.


Physical Review B | 2006

Gamma-ray spectra resulting from the annihilation of positrons with selected core levels of Cu, Ag, and Au

Seog Kyu Kim; Anat Eshed; S. Goktepeli; Philip A. Sterne; Ali R. Koymen; Wu-Chi Chen; A.H. Weiss


Materials Science Forum | 2001

Interface Defects of Al/GaAs(100) Detected by Positron Annihilation Induced Auger Electron Spectroscopy (PAES)

Wu-Chi Chen; Nail G. Fazleev; J. L. Fry; A.H. Weiss


publisher | None

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Physical Review B | 2005

Gamma Spectra Resulting From the Annihilation of Positrons with Electrons in Single, Selected Core Levels of Cu, Ag and Au

Seog Kyu Kim; Anat Eshed; S. Goktepeli; Philip A. Sterne; Ali R. Koymen; Wu-Chi Chen; A.H. Weiss


Archive | 2001

Measurements of the Relative Backscattering Yields of Positrons and Electrons from GaAs (100), Ge (100), Si(100)

Wu-Chi Chen; Shannon G. Starnes; A.H. Weiss


Archive | 2001

Annihilation of positrons trapped at the As-rich (100) surface of GaAs

Nail G. Fazleev; J. L. Fry; Wu-Chi Chen; Shannon G. Starnes; A.H. Weiss


Archive | 2001

Measurements Of Doppler Broadened Gamma Spectra Associated With The Annihilation Of Positrons With Individual Core Electron Levels

Anat Eshed; Sinan Goktepeli; Ali R. Koymen; J. L. Fry; Nail G. Fazleev; D. J. O'Kelly; Sang-Ho Kim; Wu-Chi Chen; A.H. Weiss


Archive | 2000

The growth and stability of ultra-thin Al films epitaxially grown on GaAs(100) studied using Positron Annihilation induced Auger Electron Spectroscopy (PAES) and Electron induced Auger Electron Spectroscopy (EAES)

Wu-Chi Chen; Richi Nayak; Shannon G. Starnes; Nail G. Fazleev; J. L. Fry; A.H. Weiss


Archive | 2000

New High Resolution Positron Annihilation Induced Auger Electron Spectroscopy (PAES) with Time-Of-Flight Energy Analyzer

Shu-Ping Xie; Neng Jun Jiang; Shannon G. Starnes; Richi Nayak; Wu-Chi Chen; A.H. Weiss

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A.H. Weiss

University of Texas at Arlington

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Shannon G. Starnes

University of Texas at Arlington

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Nail G. Fazleev

University of Texas at Arlington

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J. L. Fry

University of Texas at Arlington

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Ali R. Koymen

University of Texas at Arlington

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Anat Eshed

University of Texas at Arlington

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Philip A. Sterne

Lawrence Livermore National Laboratory

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Ranjani Venkataraman

University of Texas at Arlington

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Seog Kyu Kim

University of Texas at Arlington

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