Head:      Dr. Jorge Reyna Almandos Members:                • Dr. Mario Gallardo                • Dr. Fausto Bredice                •Dr. Monica Ranieri                •Ing. Anibal Laquidara

History

Work topics

• Atomic spectroscopy of medium and highly ionised noble gases in the UV-VIS-IR regions. Analysis of the spectra obtained within the framework of the regularities which are characteristic of the atomic structure such as isoelectronic sequences, isonuclear sequences and homologous sequences. Use of Hartree-Fock calculation programs and programs of diagonalization of energy matrices for the determination of energy levels, transition probabilities, mean life and other characteristic parameters.
• Temporal spectroscopy of plasmas originated by laser pulses (LIBS-OES). Determination of temperatures, electronic densities, self-absorption coefficients and characterization of plasma by perturbations at extreme electronic fields.
• Technological applications of optical spectroscopy. Analysis of radiation emitted by light sources.

The most relevant works

• Spectrum analysis.
  Xe II, III, IV, V, VI, VII, VIII
  Kr II, III, IV, V, VI, VII, VIII
  Ar III, IV, V, VI, VII
  Ne II, III, IV
  *Referenced by NIST (National Institute for Standard and Technologies, EE. UU.)
• Weighted oscillator strengths for Xe IV spectrum.
  M. Raineri , C. Lagorio, S. Padilla, M. Gallardo and J. Reyna Almandos
  Atomic Data and Nuclear Data Tables 94, 140 - 159, (2008)
• Evaluation of self-absorption coefficients of manganese emission lines in laser induced breakdown spectroscopy measurements
  F. Bredice, F.O. Borges, H. Sobral, M. Villagran-Muniz, H.O. Di Rocco, G. Cristoforetti, S. Legnaioli, V. Palleschi, L. Pardini, A. Salvetti and E. Tognoni
  Spectrochimica Acta B, 294-1303, (2006)
• Spectral analysis of the 4d96s configuration in eight times ionized xenon, Xe IX.
  M. Raineri, M. Gallardo, and J.G. Reyna Almandos
  J.Quant. Spec. and Rad. Transf. 102, 391-395, (2006)
• Extended analysis of the Ar VII spectrum in the vaccum ultraviolet
  F.O. Borges, F. Bredice, G.H. Cavalcanti, M. Gallardo, M. Raineri, J.G. Reyna Almandos and A.G. Trigueiros
  European Physical Journal D 36, 23 – 27, (2005)
• New study on the Xe VIII spectrum
  M. Gallardo, M. Raineri, M. Giuliani, C. Lagorio, S. Padilla, R. Sarmiento, J.G. Reyna Almandos
  J. Quant. Spect. And Rad. Transf. 95, 365 – 372, (2005))
• Characterization of pulsed laser generated plasma through  its perturbation in an electric field.
  Bredice, F.O.; Orzi, D.J.O.; Schinca, D.; Sobral, H.; Villagran-Muniz, M.
  IEEE Transactions on Plasma Science, 30, 2139-43, (2002)
• New energy levels of the 4s²4p5s, 4s²4p4d and 4s²4p5p configurations of the Kr V spectrum
  M Raineri, F Bredice, M Gallardo, A G Trigueiros and J Reyna Almandos
  J. Phys. B, 3411 – 3419, (2002).
• Revised and extended analysis in four times ionized xenon, Xe V
  M. GALLARDO, M. RAINERI, J. G. REYNA ALMANDOS, H. SOBRAL, F. CALLEGARI
  J. Quant. Spec. and Rad. Transf., 61, 319 (1999).
• Extended analysis of three-times ionized krypton (Kr IV)
  J G Reyna Almandos, F Bredice, M Raineri, M Gallardo and A G Trigueiros
  J. Phys. B, 31, 3129-3136, (1998).
• Revised and extended analysis of five times ionized argon (Ar VI)
  M Raineri, F Bredice, M Gallardo, J G Reyna Almandos, C J B Pagan and A G Trigueiros
  Physica Scripta, 45, 584-589, (1992).
• 5s25p2 (5d+6s) configurations in triply ionized xenon (Xe IV)
  J. G. Reyna Almandos, F. Bredice, M. Gallardo, and C. J. B. Pagan, H. O. Di Rocco, A. G. Trigueiros
  Phys. Rev. A , 43, 6098 (1991).

Collaboration with other Institutions and Research groups

• Grupo de Espectroscopía, Universidad de Lund, Suecia.
• Grupo de Fotofísica, CCADET, Universidad Nacional Autónoma de México.
• Applied Laser Spectroscopy Laboratory, Istituto per i Processi.
• Chimico-Fisici (IPCF) CNR, Pisa, Italia.
• Laboratorio de Plasma y Espectroscopía Atómica, Universidad Federal.
• Fluminense, Niteroi, Brasil.
• IFAS, UNCPBA, Tandil.
• Facultad de Ciencias Exactas y Naturales, UNMdP.
• Instituto de Física de Rosario (IFIR).

Available equipament

• A CCD intensified camera with temporal gate.
• Two Ebert spectrographs (UV-VIS-IR) (3.4 m focal distance) with photographic and in -real -time detection by diode arrangement.
• A normal-incidence spectrograph (V.U.V.) with a 3 m focal distance.
• A grazing -incidence spectrograph (V.U.V) with a 3 m de focal distance.
• A monochromator (UV-UV-IR) with a  0,5 m focal distance, equipped with CCD camera.
• High vacuum equipments and high voltage sources.
• Ash microdensitometer.

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