39 citations · 78 across the 8 of their papers we have counts for
9 papers
Experimental and theoretical approaches for determining the K-shell fluorescence yield of carbon
Philipp Hönicke, Rainer Unterumsberger, Mauro Guerra +8
The knowledge of atomic fundamental parameters, such as the fluorescence yields with low uncertainties, is of decisive importance in elemental quantification involving X-ray fluore…
Relativistic electron impact ionization cross sections of carbon ions and application to an optically thin plasma
Miguel A. de Avillez, Mauro Guerra, José Paulo Santos +4
Aims. Determination of K- and L-shell cross sections of the carbon atom and ions using the modified relativistic binary encounter Bethe (MRBEB) method, a simple analytical scheme b…
High-precision measurements of transition energies and level widths in He- and Be-like Argon Ions
J. Machado, C. I. Szabo, J. P. Santos +7
We performed a reference-free measurement of the transition energies of the line in He-like argon, and of the $1s 2s^2 2p\,^1P\_1\to 1s^2 2s^2\,^1S…
Assessment of toxic metals and hazardous substances in tattoo inks using Sy-XRF, AAS and Raman spectroscopy
Marta Manso, Sofia Pessanha, Mauro Guerra +6
A set of tattoo inks from a top brand was analysed by means of Synchrotron-based X-ray Fluorescence spectrometry (Sy-XRF), Atomic Absorption spectrometry (AAS) and Raman Spectrosco…
The proton radius puzzle
J. J. Krauth, K. Schuhmann, M. Abdou Ahmed +49
High-precision measurements of the proton radius from laser spectroscopy of muonic hydrogen demonstrated up to six standard deviations smaller values than obtained from electron-pr…
Relativistic evaluation of the two-photon decay of the metastable ${1s}^{2} 2s 2p~^3\mbox{P}_0$ state in berylliumlike ions with an active-electron model
Pedro Amaro, Filippo Fratini, Laleh Safari +4
The two-photon ${1s}^{2} 2s 2p~^3\mbox{P}_0 \rightarrow {1s}^{2} {2s}^2$ $^1\mbox{S}_0$ transition in berylliumlike ions is theoretically investigated within a full relativistic fr…
Absolute L-shell ionization and X-ray production cross sections of Lead and Thorium by 16-45 keV electron impact
H. V. Rahangdale, P. K. Das, S. De +4
The absolute L subshell specific electron impact ionization cross sections near the ionization threshold (16 < E < 45 keV) of Lead and Thorium are obtained from the measured L X-ra…
A vacuum double-crystal spectrometer for reference-free highly charged ions X-ray spectroscopy
P. Amaro, C. I. Szabo, S. Schlesser +10
We have built a vacuum double crystal spectrometer, which coupled to an electron-cyclotron resonance ion source, allows to measure low-energy x-ray transitions in highly-charged io…
New expression for the K-shell ionization
J. P. Santos, M. Guerra, F. Parente
A new expression for the total K-shell ionization cross section by electron impact based on the relativistic extension of the binary encounter Bethe (RBEB) model, valid from ioniza…