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High resolution multiphoton spectroscopy by a tunable free-electron-laser light.
Zitnik, M; Mihelic, A; Bucar, K; Kavcic, M; Rubensson, J-E; Svanquist, M; Söderström, J; Feifel, R; Såthe, C; Ovcharenko, Y; Lyamayev, V; Mazza, T; Meyer, M; Simon, M; Journel, L; Lüning, J; Plekan, O; Coreno, M; Devetta, M; Di Fraia, M; Finetti, P; Richter, R; Grazioli, C; Prince, K C; Callegari, C.
Afiliação
  • Zitnik M; Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia and Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, SI-1000 Ljubljana, Slovenia.
  • Mihelic A; Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
  • Bucar K; Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
  • Kavcic M; Jozef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
  • Rubensson JE; Uppsala University, Department of Physics and Astronomy, P.O. Box 530, S-75121 Uppsala, Sweden.
  • Svanquist M; Uppsala University, Department of Physics and Astronomy, P.O. Box 530, S-75121 Uppsala, Sweden.
  • Söderström J; Uppsala University, Department of Physics and Astronomy, P.O. Box 530, S-75121 Uppsala, Sweden.
  • Feifel R; Uppsala University, Department of Physics and Astronomy, P.O. Box 530, S-75121 Uppsala, Sweden and University of Gothenburg, Department of Physics, SE-412 96 Gothenburg, Sweden.
  • Såthe C; MAX IV Laboratory, Lund University, P.O. Box 118, 22100 Lund, Sweden.
  • Ovcharenko Y; Technische Universität Berlin, Institut für Optik und Atomare Physik, Eugene-Wigner-Building Hardenbergstrasse 36, D-10623 Berlin, Germany.
  • Lyamayev V; Institute of Physics, University of Freiburg, Hermann-Herder Strasse 3a, D-79104 Freiburg, Germany.
  • Mazza T; European XFEL GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany.
  • Meyer M; European XFEL GmbH, Albert-Einstein-Ring 19, 22761 Hamburg, Germany.
  • Simon M; Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France and CNRS, UMR 7614, LCPMR, 75005 Paris, France.
  • Journel L; Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France and CNRS, UMR 7614, LCPMR, 75005 Paris, France.
  • Lüning J; Sorbonne Université, UPMC Univ Paris 06, UMR 7614, LCPMR, 75005 Paris, France and CNRS, UMR 7614, LCPMR, 75005 Paris, France.
  • Plekan O; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy.
  • Coreno M; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy.
  • Devetta M; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy.
  • Di Fraia M; Department of Physics, University of Trieste, Via Valerio 2, I-34124 Trieste, Italy.
  • Finetti P; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy.
  • Richter R; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy.
  • Grazioli C; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy.
  • Prince KC; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy and eChemistry Laboratory, Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn, Melbourne, Victoria 3122, Australia.
  • Callegari C; Elettra-Sincrotrone Trieste, Strada Statale 14-km 163, 5, I-34149 Basovizza, Trieste, Italy.
Phys Rev Lett ; 113(19): 193201, 2014 Nov 07.
Article em En | MEDLINE | ID: mdl-25415905
ABSTRACT
Seeded free electron lasers theoretically have the intensity, tunability, and resolution required for multiphoton spectroscopy of atomic and molecular species. Using the seeded free electron laser FERMI and a novel detection scheme, we have revealed the two-photon excitation spectra of dipole-forbidden doubly excited states in helium. The spectral profiles of the lowest (-1,0)(+1) (1)S(e) and (0,1)(0) (1)D(e) resonances display energy shifts in the meV range that depend on the pulse intensity. The results are explained by an effective two-level model based on calculated Rabi frequencies and decay rates.
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Eslovênia
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Eslovênia