Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Sant’Anna, M. M."'
We present measurements of the total projectile-electron-loss cross sections in O$^-$ + N$_2$ collisions in the energy range from 2.5 to 8.5 keV. Two different techniques, beam attenuation and the growth rate, are employed. The difference between the
Externí odkaz:
http://arxiv.org/abs/2309.05757
Akademický článek
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Autor:
Mueller, A, Schippers, S, Phaneuf, R A, Covington, A M, Aguilar, A, Hinojosa, G, Bozek, J, Sant'Anna, M M, Schlachter, A S, Cisneros, C, McLaughlin, B M
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 50 (2017) 205001
Relative cross sections for the valence shell photoionisation (PI) of $\rm ^2S$ ground level and $\rm ^2D$ metastable Ca$^{+}$ ions were measured with high energy resolution by using the ion-photon merged-beams technique at the Advanced Light Source.
Externí odkaz:
http://arxiv.org/abs/1710.06475
Publikováno v:
Phys. Rev. B 95, 054515 (2017)
We followed the evolution of the normal and superconducting properties of Al thin films after each session of various successive oxygen irradiations at ambient temperature. Such irradiated films, similar to the granular ones, exhibit enhanced superco
Externí odkaz:
http://arxiv.org/abs/1606.08918
Autor:
Codeço, C. F. S., Mello, S. L. A., Penello, G. M., Magnani, B. F., Santos, A. C. F., Sant’Anna, M. M.
Publikováno v:
The Journal of Physical Chemistry - Part C; October 2024, Vol. 128 Issue: 43 p18566-18573, 8p
Innershell ionization of a $1s$ electron by either photons or electrons is important for X-ray photoionized objects such as active galactic nuclei and electron-ionized sources such as supernova remnants. Modeling and interpreting observations of such
Externí odkaz:
http://arxiv.org/abs/1412.5914
Autor:
Hinojosa, G., Covington, A. M., Alna'Washi, G. A., Lu, M., Phaneuf, R. A., Sant'Anna, M. M., Cisneros, C., Álvarez, I., Aguilar, A., Kilcoyne, A. L. D., Schlachter, A. S., Ballance, C. P., McLaughlin, B. M.
Photoionization of Kr$^+$ ions was studied in the energy range from 23.3 eV to 39.0 eV at a photon energy resolution of 7.5 meV. Absolute measurements were performed by merging beams of Kr$^+$ ions and of monochromatized synchrotron undulator radiati
Externí odkaz:
http://arxiv.org/abs/1211.5181
Autor:
Covington, A. M., Aguilar, A., Covington, I. R., Hinojosa, G., Shirley, C. A., Álvarez, I., Cisneros, C., Dominguez-Lopez, I., Sant'Anna, M. M., Schlachter, A. S., Ballance, C. P., McLaughlin, B. M.
Publikováno v:
Physical Review A 84, 013413 (2011)
Absolute cross-section measurements for valence-shell photoionization of Ar$^{+}$ ions are reported for photon energies ranging from 27.4 eV to 60.0 eV. The data, taken by merging beams of ions and synchrotron radiation at a photon energy resolution
Externí odkaz:
http://arxiv.org/abs/1203.4292
Autor:
Sant'Anna, M. M., Schlachter, A. S., Öhrwall, G., Stolte, W. C., Lindle, D. W., McLaughlin, B. M.
Publikováno v:
Physical Review Letters 107, 033001 (2011)
Absolute {\it K}-shell photoionization cross sections for atomic nitrogen have been obtained from both experiment and state-of-the-art theoretical techniques. Due to the difficulty of creating a target of neutral atomic nitrogen, no high-resolution {
Externí odkaz:
http://arxiv.org/abs/1203.4250
Autor:
Sinnecker, E. H. C. P., Penello, G. M., Rappoport, T. G., Sant'Anna, M. M., Souza, D. E. R., Pires, M. P., Liu, X., Furdyna, J. K.
Publikováno v:
Phys. Rev. B 81, 245203 (2010)
We study the controlled introduction of defects in GaMnAs by irradiating the samples with energetic ion beams, which modify the magnetic properties of the DMS. Our study focuses on the low-carrier-density regime, starting with as-grown GaMnAs films a
Externí odkaz:
http://arxiv.org/abs/0811.3158