Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Varghese A. Chirayath"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 518:7-14
Autor:
Alexander J. Fairchild, Varghese A. Chirayath, Randall W. Gladen, Ali R. Koymen, Alex H. Weiss, Bernardo Barbiellini
Publikováno v:
Physical review letters. 129(10)
We present a spectroscopic method which utilizes virtual photons to selectively measure the electronic structure of the topmost atomic layer. These virtual photons are created when incident positrons transition from vacuum states to bound surface sta
Publikováno v:
Acta Physica Polonica A. 137:87-90
Autor:
A. J. Fairchild, Philip A. Sterne, E. Perez, Ali R. Koymen, Alex H. Weiss, S. Lotfimarangloo, R. W. Gladen, Varghese Anto Chirayath
Publikováno v:
Acta Physica Polonica A. 137:81-86
Autor:
Philip A. Sterne, Varghese Anto Chirayath, Alex H. Weiss, A. J. Fairchild, R. W. Gladen, Ali R. Koymen, S. Lotfimarangloo, M. T. Manry, T. N. Shead
Publikováno v:
Acta Physica Polonica A. 137:101-104
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
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
http://arxiv.org/abs/2004.00008
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)
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
http://arxiv.org/abs/2003.02975
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
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
http://arxiv.org/abs/1907.10582