@article {a16d03ef21ef44ff8999f7aedaeec888, title = {Elemental mapping of Portuguese ceramic pieces with a full-field XRF scanner based on a 2D-THCOBRA detector}, journal = {European Physical Journal Plus}, volume = {136}, number = {4}, year = {2021}, note = {

info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC\%2FFIS-AQM\%2F32536\%2F2017/PT$\#$ info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC\%2FFIS-AQM\%2F32536\%2F2017/PT$\#$ info:eu-repo/grantAgreement/FCT/FARH/PD\%2FBD\%2F128324\%2F2017/PT$\#$ UID/FIS/04559/2020

}, publisher = {Springer Science + Business Media}, abstract = {

In this work, we present a novel application of the full-field energy-dispersive X-ray fluorescence (EDXRF) imaging system based on a MicroPattern Gaseous Detector (2D-THCOBRA) in the cultural heritage field. The detector has an intrinsic imaging capability with spatial resolution of 400μmFWHM, and is energy sensitive, presenting an energy resolution of approximately 1keVFWHM at 5.9keV. The full-field XRF scanner based on the 2D-THCOBRA detector allows mapping the distribution of elements in large area samples with high detection efficiency (75 \% at 5.9keV), being a very promising choice for elemental mapping analysis of large area cultural heritage samples. In this work, we have demonstrated the imaging capabilities of the full-field XRF scanner and used it to assess the restoration of a Portuguese faience piece.

}, issn = {2190-5444}, doi = {10.1140/epjp/s13360-021-01422-y}, author = {Carvalho, {Patr{\'\i}cia Miguel da Silva} and F{\'a}bio Leite and Silva, {A. L. M.} and Pessanha, Sofia and Carvalho, {Maria Lu{\'\i}sa} and Veloso, {Jo{\~a}o F. C. A.} and Santos, {Jos{\'e} Paulo}} } @article {Carvalho_2020, title = {Energy dispersive X-ray fluorescence quantitative analysis of biological samples with the external standard method}, journal = {Spectrochimica Acta Part B: Atomic Spectroscopy}, volume = {174}, year = {2020}, note = {n/a}, month = {dec}, pages = {105991}, publisher = {Elsevier {BV}}, abstract = {n/a}, doi = {10.1016/j.sab.2020.105991}, url = {https://doi.org/10.1016\%2Fj.sab.2020.105991}, author = {Patr{\'{\i}}cia M.S. Carvalho and Pessanha, Sofia and Machado, Jorge and Ana Lu{\'{\i}}sa Silva and Jo{\~a}o Veloso and Diogo Casal and Diogo Pais and Jos{\'e} Paulo Santos} } @article {12496, title = {Elemental mapping in a contemporary miniature by full-field X-ray fluorescence imaging with gaseous detector vs. scanning X-ray fluorescence imaging with polycapillary optics}, year = {2017}, note = {n/a}, month = {Feb 03}, pages = {1-7}, publisher = {Elsevier B.V.}, abstract = {

Spectrochimica Acta Part B: Atomic Spectroscopy, 129 (2016) 1-7. doi:10.1016/j.sab.2016.12.006

}, author = {Silva, A L M and Cirino, S and M. L. Carvalho and Manso, M. and Pessanha, S. and Azevedo, C D R and Carramate, L F N D and J P Santos and M Guerra and Veloso, J F C A} } @article {10149, title = {Elemental mapping of biofortified wheat grains using micro X-ray fluorescence}, journal = {Spectrochimica Acta Part B: Atomic Spectroscopy}, volume = {120}, year = {2016}, note = {n/a}, month = {Jun 01}, pages = {30-36}, publisher = {Elsevier B.V.}, abstract = {

Spectrochimica Acta Part B: Atomic Spectroscopy, 120 (2016) 30-36. doi:10.1016/j.sab.2016.03.014

}, url = {http://dx.doi.org/10.1016/j.sab.2016.03.014}, author = {Ramos, I and Pataco, I M and Mourinho, M P and Lidon, F and Reboredo, F and Pessoa, M F and M. L. Carvalho and J P Santos and M Guerra} } @article {12511, title = {Engenharia na Medicina}, journal = {Gazeta M{\'e}dica}, volume = {3}, number = {2}, year = {2016}, note = {n/a}, pages = {50-53}, abstract = {n/a}, url = {http://www.gazetamedica.pt/index.php/24-gazeta-vol-3-n-2-abril-junho-2016/historia/26-engenharia-na-medicina}, author = {J P Santos} } @article {8067, title = {Energy levels, transition rates and lifetimes for Li-like ions with Z<= 10 in the 1 s2 s( 3S)3l states}, journal = {Journal of Physics: Conference Series}, volume = {635}, number = {5}, year = {2015}, note = {n/a}, month = {Sep 07}, pages = {052060-2}, abstract = {n/a}, url = {http://stacks.iop.org/1742-6596/635/i=5/a=052060?key=crossref.3568a03fe0ab0bd1d12e8ff6eedaaee5}, author = {J P Santos and J. P. Marques and M. C. Martins and P. Indelicato and Benis, E P and Zouros, T J M and F. Parente} } @article {8057, title = {Electron impact ionization cross-sections for few-electron uranium ions}, journal = {Journal of Physics B: Atomic, Molecular and Optical Physics}, volume = {48}, number = {14}, year = {2015}, note = {n/a}, month = {May 21}, pages = {1-5}, publisher = {IOP Publishing}, abstract = {

Journal of Physics B: Atomic, Molecular and Optical Physics, 48(2015) 144027. doi:10.1088/0953-4075/48/14/144027

}, url = {http://dx.doi.org/10.1088/0953-4075/48/14/144027}, author = {M Guerra and Th St{\"o}hlker and P Amaro and Machado, J and J P Santos} } @article {8118, title = {Evaluation of the effective solid angle of a hemispherical deflector analyser with injection lens for metastable Auger projectile states}, journal = {Nuclear Inst. and Methods in Physics Research, B}, volume = {365}, number = {Part B}, year = {2015}, note = {n/a}, month = {Dec 15}, pages = {457-461}, publisher = {Elsevier B.V.}, abstract = {

Nuclear Inst. and Methods in Physics Research, B, 365 (2015) 457-461. doi:10.1016/j.nimb.2015.07.006

}, url = {http://dx.doi.org/10.1016/j.nimb.2015.07.006}, author = {Benis, E P and Doukas, S and Zouros, T J M and P. Indelicato and F. Parente and C. Martins and J P Santos and J. P. Marques} } @article {8054, title = {Experimental and theoretical determination of the Kα2/Kα1 intensity ratio for zinc}, journal = {Journal of Quantitative Spectroscopy andRadiative Transfer}, volume = {151}, year = {2015}, note = {n/a}, pages = {295-299}, abstract = {

X-ray intensity ratios, such as the Kα2/Kα1 ratio, are parameters with a large application in atomic physics and related scientific and technological areas. D.

}, url = {http://dx.doi.org/10.1016/j.jqsrt.2014.10.013}, author = {Ito, Y and Tochio, T and Fukushima, S and Taborda, A and Sampaio, J M and J. P. Marques and F. Parente and P. Indelicato and J P Santos} } @article {6854, title = {Elemental characterization of plants and soils in Panasqueira tungsten mining region}, journal = {Journal of Soils Sediments}, volume = {14}, year = {2014}, note = {n/a}, pages = {778}, abstract = {

... Title Elemental characterization of plants and soils in Panasqueira tungsten mining region Journal Journal of Soils and Sediments Volume 14, Issue 4 , pp 778-784 Cover Date 2014-04-01 DOI 10.1007 / s11368 - 013 - 0788 - x Print ISSN 1439-0108 Online ISSN 1614-7480 ...

}, url = {http://link.springer.com/article/10.1007/s11368-013-0788-x}, author = {Santos, S. C. P. L. and Cruz, M. E. and Barroso, A. M. E. and Fonseca, C. P. S. and M Guerra and M. L. Carvalho and J P Santos} } @article {8069, title = {Elemental characterization of plants and soils in Panasqueira tungsten mining region}, journal = {Journal of Soils Sediments}, volume = {14}, year = {2014}, note = {n/a}, pages = {778}, abstract = {

... Title Elemental characterization of plants and soils in Panasqueira tungsten mining region Journal Journal of Soils and Sediments Volume 14, Issue 4 , pp 778-784 Cover Date 2014-04-01 DOI 10.1007 / s11368 - 013 - 0788 - x Print ISSN 1439-0108 Online ISSN 1614-7480 ...

}, url = {http://link.springer.com/article/10.1007/s11368-013-0788-x}, author = {Santos, S. C. P. L. and Cruz, M. E. and Barroso, A. M. E. and Fonseca, C. P. S. and M Guerra and M. L. Carvalho and J P Santos} } @article {5678, title = {Elemental characterization of plants and soils in Panasqueira tungsten mining region}, volume = {Online}, year = {2013}, note = {n/a}, month = {Oct 16}, abstract = {n/a}, url = {http://link.springer.com/10.1007/s11368-013-0788-x}, author = {P{\'e}-Leve Santos, Sara C and Cruz, Mariana Eloy and Barroso, Ant{\'o}nio M E and Fonseca, Catarina P S and Guerra, Mauro and Carvalho, Maria Luisa and Santos, Jose Paulo} } @article {8124, title = {Euphysics News}, volume = {44}, number = {5}, year = {2013}, note = {n/a}, month = {Oct 07}, pages = {1-36}, abstract = {n/a}, author = {EPS} } @article {6863, title = {Electron impact ionization cross sections of several ionization stages of Kr, Ar and Fe}, journal = {International Journal of Mass Spectrometry}, volume = {348}, year = {2013}, note = {n/a}, month = {Aug 15}, pages = {1-8}, publisher = {Elsevier B.V.}, abstract = {

International Journal of Mass Spectrometry, 348 (2013) 1-8. doi:10.1016/j.ijms.2013.02.011

}, url = {http://www.sciencedirect.com/science/article/pii/S1387380613000729}, author = {M Guerra and F. Parente and J P Santos} } @article {8103, title = {Electron impact ionization cross sections of several ionization stages of Kr, Ar and Fe}, journal = {International Journal of Mass Spectrometry}, volume = {348}, year = {2013}, note = {n/a}, month = {Aug 15}, pages = {1-8}, publisher = {Elsevier B.V.}, abstract = {

International Journal of Mass Spectrometry, 348 (2013) 1-8. doi:10.1016/j.ijms.2013.02.011

}, url = {http://www.sciencedirect.com/science/article/pii/S1387380613000729}, author = {M Guerra and F. Parente and J P Santos} } @article {199, title = {Electron impact ionization of atomic target inner-shells}, journal = {Journal of Physics: Conference Series}, volume = {194}, number = {4}, year = {2009}, pages = {042047}, abstract = {There is a need for reliable theoretical methods to calculate electron-impact total ionization cross sections for the large number of neutral atoms and ions with open shell structures. These cross sections are used in a wide range of scientific and industrial applications, such as astrophysical plasmas, atmospheric science, X-ray lasers, magnetic fusion, radiation physics, semiconductor fabrication, accelerator physics and tumor therapy physics. The binary-encounter-Bethe (BEB) model [1], using an analytic formula that requires only two atomic constants, the binding energy and kinetic energy of the electrons, generates direct ionization cross sections for any neutral atom (or molecule), which are reliable in intensity (15\%) and shape from the ionization threshold to a few keV in the incident energy [3], or to thousands keV if we consider its relativistic version(RBEB) [2]. In this work we present K- and L-shell ionization cross sections calculations for heavy atoms.}, doi = {DOI: 10.1088/1742-6596/194/4/042047}, url = {http://stacks.iop.org/1742-6596/194/042047}, author = {M Guerra and F. Parente and J P Santos} } @article {8050, title = {Electron impact ionization of atomic target inner-shells}, journal = {Journal of Physics: Conference Series}, volume = {194}, number = {4}, year = {2009}, note = {

Webpage CFA-FCTUNLJPS-Ref40

}, pages = {042047}, abstract = {

There is a need for reliable theoretical methods to calculate electron-impact total ionization cross sections for the large number of neutral atoms and ions with open shell structures. These cross sections are used in a wide range of scientific and industrial applications, such as astrophysical plasmas, atmospheric science, X-ray lasers, magnetic fusion, radiation physics, semiconductor fabrication, accelerator physics and tumor therapy physics. The binary-encounter-Bethe (BEB) model [1], using an analytic formula that requires only two atomic constants, the binding energy and kinetic energy of the electrons, generates direct ionization cross sections for any neutral atom (or molecule), which are reliable in intensity (15\%) and shape from the ionization threshold to a few keV in the incident energy [3], or to thousands keV if we consider its relativistic version(RBEB) [2]. In this work we present K- and L-shell ionization cross sections calculations for heavy atoms.

}, url = {http://stacks.iop.org/1742-6596/194/042047}, author = {M Guerra and F. Parente and J P Santos} } @article {207, title = {Experimental and theoretical transition probabilities for lines arising from the 6p configurations of Au II}, journal = {Journal of Physics B: Atomic, Molecular and Optical Physics}, volume = {40}, number = {24}, year = {2007}, pages = {4651}, abstract = {Experimental relative transition probabilities for the 16 more pro-eminent lines arising from the 6p configurations of Au II were determined from the emission-line intensities in a laser-produced plasma. The experiment was carried out using a Cu-Au alloy with 10\% Au content in order to obtain an optically thin plasma. Transition probabilities were placed on an absolute scale by using theoretical lifetimes calculated in this work, line-strength sum rules and Boltzmann plot. A comparison has been conducted between present experimental results, the theoretical data available and new calculations with the multi-configuration Dirac-Fock method reported in this work, as well as a study of the plasma conditions.}, url = {http://stacks.iop.org/0953-4075/40/4651}, author = {R. Mayo and M. Ortiz and F. Parente and J P Santos} } @article {8110, title = {Experimental and theoretical transition probabilities for lines arising from the 6p configurations of Au II}, journal = {Journal of Physics B: Atomic, Molecular and Optical Physics}, volume = {40}, number = {24}, year = {2007}, note = {

JPS-Ref32

}, pages = {4651}, abstract = {

Experimental relative transition probabilities for the 16 more pro-eminent lines arising from the 6p configurations of Au II were determined from the emission-line intensities in a laser-produced plasma. The experiment was carried out using a Cu-Au alloy with 10\% Au content in order to obtain an optically thin plasma. Transition probabilities were placed on an absolute scale by using theoretical lifetimes calculated in this work, line-strength sum rules and Boltzmann plot. A comparison has been conducted between present experimental results, the theoretical data available and new calculations with the multi-configuration Dirac-Fock method reported in this work, as well as a study of the plasma conditions.

}, url = {http://stacks.iop.org/0953-4075/40/4651}, author = {R. Mayo and M. Ortiz and F. Parente and J P Santos} } @article {8066, title = {Energy levels of hydrogenlike kaonic atoms}, journal = {Hyperfine Interactions}, volume = {146-147}, year = {2003}, note = {

JPS-Ref17

}, pages = {325}, abstract = {

Energies of the [( n ,l= n -1),1= n =20] and the [( n ,l= n -2),2= n =20] levels have been calculated for several hydrogenlike kaonic atoms throughout the periodic table, using the current world average kaon mass. Calculations were done in the framework of the Klein{\textendash}Gordon equation, with finite nuclear size and all-order vacuum polarization corrections.

}, url = {http://www.springerlink.com/content/k0701556x6365266/}, author = {J P Santos and F. Parente and S. Boucard and P. Indelicato} } @article {8126, title = {Extension of the binary-encounter-dipole model to relativistic incident electrons}, journal = {Physical Review A}, volume = {62}, year = {2000}, note = {

JPS-Ref07

}, pages = {052710}, abstract = {

Formulas for the total ionization cross section by electron impact based on the binary-encounter-dipole (BED) model and its simpler version, the binary-encounter-Bethe (BEB) model are extended to relativistic incident electron energies. Total ionization cross sections for the hydrogen and helium atoms from the new relativistic formulas are compared to experimental data. Relativistic effects double the total ionization cross section of H and He at incident electron energy 300 keV and dominate the cross section thereafter. A simple modification of the original BED-BEB formulas is proposed for applications to ion targets and inner-shell electrons of neutral atoms and molecules. The relativistic and nonrelativistic BEB cross sections are compared to the K-shell ionization cross sections by electron impact for the carbon, argon, nickel, niobium, and silver atoms. For carbon and argon, the relativistic effects are small, and both forms of the BEB cross sections agree well with available experimental data. For the nickel and heavier atoms, the relativistic increase of cross sections becomes noticeable from about 100 keV and higher in the incident electron energy. The empirical formula by Casnati et al. [J. Phys. B 15, 155 (1982)] after correcting for relativistic effects as shown by Quarles [Phys. Rev. A 13, 1278 (1976)] agrees well with the BEB cross sections for light atoms. However, the peak values of the Casnati cross sections become higher than the relativistic BEB peak cross sections as the atomic number increases. The BEB model is also applied to the total ionization cross section of the xenon atom, and the theory agrees well with experiments at low incident electron energies, but disagrees with experiment at relativistic incident energies.

}, url = {http://link.aps.org/doi/10.1103/PhysRevA.62.052710}, author = {Kim, Y. K. and J P Santos and F. Parente} }