Zobrazeno 1 - 10 of 24 pro vyhledávání: '"R. W. Gladen"'
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Akademický článek
Auger electron emission initiated by the creation of valence-band holes in graphene by positron annihilation
Autor: V. A. Chirayath, V. Callewaert, A. J. Fairchild, M. D. Chrysler, R. W. Gladen, A. D. Mcdonald, S. K. Imam, K. Shastry, A. R. Koymen, R. Saniz, B. Barbiellini, K. Rajeshwar, B. Partoens, A. H. Weiss
Publikováno v: Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Auger processes are at the core of electron emission in solid-state physics, however measuring the spectra of electrons emitted solely as a result of Auger transitions remains a challenge. Here, the authors measure the electron energy spectrum in gra
Externí odkaz: https://doaj.org/article/9c053af230f64e04a827e9fd401cffda
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5
Measurement of the full electron spectrum associated with the Ag N3VV Auger transitions: Evidence for the contribution of multi-electron Auger processes
Autor: A. J. Fairchild, Alex H. Weiss, Q. Dong, Robert Bartynski, K. Shastry, Steven L. Hulbert, R. W. Gladen, Sushant Kalaskar, Wolfgang S. M. Werner, Varghese Anto Chirayath, P.V. Joglekar
Publikováno v: Journal of Electron Spectroscopy and Related Phenomena. 235:16-22
We report the first measurement of the full energy spectrum (down to 0 eV) of electrons emitted from the surface of Ag(100) as a result of the N3VV Auger transition. A comparison with a Monte-Carlo model was used to obtain an estimate of the contribu
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f87cc32e89a187f023c69acfeadb9247
https://doi.org/10.1016/j.elspec.2019.06.006
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6
Efficient Machine Learning Approach for Optimizing the Timing Resolution of a High Purity Germanium Detector
Autor: Alex H. Weiss, A. J. Fairchild, Varghese Anto Chirayath, M. T. Manry, R. W. Gladen, A. R. Koymen
We describe here an efficient machine-learning based approach for the optimization of parameters used for extracting the arrival time of waveforms, in particular those generated by the detection of 511 keV annihilation γ -rays by a 60 cm3 coaxial hi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8f613cfeb3326d2940d99bbc9c51480
http://arxiv.org/abs/2004.00008
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7
Direct evidence for low-energy electron emission following O LVV Auger transitions at oxide surfaces
Autor: Alex H. Weiss, A. J. Fairchild, A. R. Koymen, Philip A. Sterne, Varghese Anto Chirayath, R. W. Gladen
Publikováno v: Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
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 unexplored Auger transition in oxides, where a valence band electron fills
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f4574426079829a7dbcfd78ef9006fc
http://arxiv.org/abs/2003.02975
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8
Identification of Auger mechanisms responsible for low energy electron emission from graphene on copper using Auger-gamma coincidence spectroscopy
Autor: Alex H. Weiss, A. R. Koymen, Philip A. Sterne, R. W. Gladen, A. J. Fairchild, Varghese Anto Chirayath
Publikováno v: Journal of Electron Spectroscopy and Related Phenomena. 251:147095
We have applied positron annihilation induced Auger-gamma coincidence spectroscopy to identify important mechanisms responsible for the emission of low energy electrons following the sudden creation of holes in bilayer graphene on copper substrate. T
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fe54df50600c49771b763b50bb68f1ca
https://doi.org/10.1016/j.elspec.2021.147095
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9
Coincident Measurement of the Energy Spectra of Doppler-Shifted Annihilation Gamma Quanta and Positron-Induced Secondary Electrons
Autor: A. R. Koymen, N. K. Byrnes, Alex H. Weiss, A. J. Fairchild, R. W. Gladen, Varghese Anto Chirayath
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 Doppler-shifted annihilation quanta and positron-induced Auger electrons. W
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d580d8ceae71a02c2d8f8f6c09125856
http://arxiv.org/abs/1907.10582
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10
Positronium formation in graphene and graphite
Autor: A. J. Fairchild, Alex H. Weiss, M. D. Chrysler, Varghese Anto Chirayath, R. W. Gladen, A. R. Koymen
Positronium (Ps) formation on the surface of clean polycrystalline copper (Cu), highly oriented pyrolytic graphite (HOPG) and multi layer graphene (MLG) grown on a polycrystalline copper substrate has been investigated as a function of incident posit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48c7d63c1977125d6188250d2dc3d97c
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