44 citations · 62 across the 7 of their papers we have counts for
7 papers
Photoemission spectroscopy using virtual photons emitted by positron sticking: a new probe of the top layer surface electronic structure
Alexander J Fairchild, Varghese A. Chirayath, Bernardo Barbiellini +3
We present a spectroscopic method which utilizes virtual photons to selectively measure the electronic structure of the top-most atomic layer. These virtual photons are created whe…
Identification of Auger mechanisms responsible for low energy electron emission from graphene on copper using Auger-gamma coincidence spectroscopy
R. W. Gladen, V. A. Chirayath, P. A. Sterne +3
We present a novel method for the analysis of the Doppler broadened spectrum of gamma photons emitted following the annihilation of surface trapped positrons with the electrons of…
Direct evidence for low-energy electron emission following O LVV Auger transitions at oxide surfaces
Alexander J. Fairchild, Varghese A. Chirayath, Philip A. Sterne +3
Oxygen, the third most abundant element in the universe, plays a key role in the chemistry of condensed matter and biological systems. Here, we report evidence for a hitherto unexp…
Coincident Measurement of the Energy Spectra of Doppler-Shifted Annihilation Gamma Quanta and Positron-Induced Secondary Electrons
R W Gladen, V A Chirayath, A J Fairchild +3
Preliminary results are presented from a new positron beam system currently under development at the University of Texas at Arlington for the coincident energy measurement of Doppl…
Application of Doppler Broadened Gamma Spectroscopy to Study the Surface of Graphene
A. H. Weiss, V. A. Chirayath, R. W. Gladen +4
We present Doppler broadened gamma spectra, obtained using the newly developed advanced positron beam at the University of Texas at Arlington, from a sample consisting of 6 to 8 la…
Background Free Measurement of the Spectra of Low Energy Electrons Emitted as a Result of Auger Transitions in Metals
S. F. Mukherjee, K. Shastry, A. H. Weiss
Positron annihilation induced Auger electron spectroscopy was used to obtain Cu and Au Auger spectra that are free of primary beam induced background by impinging the positrons at…