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Title: Tracing direct and sequential two-photon double ionization of D{sub 2} in femtosecond extreme-ultraviolet laser pulses

Abstract

Two-photon double ionization (TPDI) of D{sub 2} is studied for 38-eV photons at the Free Electron Laser in Hamburg (FLASH). Based on model calculations, instantaneous and sequential absorption pathways are identified as separated peaks in the measured D{sup +}+D{sup +} fragment kinetic energy release (KER) spectra. The instantaneous process appears at high KER, corresponding to ionization at the molecule's equilibrium distance, in contrast to sequential ionization mainly leading to low-KER contributions. Measured fragment angular distributions are in good agreement with theory.

Authors:
; ; ; ; ;  [1]; ;  [2]; ; ;  [3]; ; ;  [4]; ; ;  [5];  [6]; ;  [7]
  1. Max-Planck-Institut fuer Kernphysik, D-69117 Heidelberg (Germany)
  2. Max-Planck Advanced Study Group at CFEL, D-22607 Hamburg (Germany)
  3. Departamento de Quimica C-9, Universidad Autonoma de Madrid, E-28049 Madrid (Spain)
  4. Max-Planck-Institut fuer Quantenoptik, D-85748 Garching (Germany)
  5. Institut fuer Kernphysik, Universitaet Frankfurt, D-60486 Frankfurt (Germany)
  6. Instituto de Fisica, Universidad de Antioquia, Medellin (Colombia)
  7. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
Publication Date:
OSTI Identifier:
21408166
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 81; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.81.021401; (c) 2010 The American Physical Society; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANGULAR DISTRIBUTION; DEUTERIUM IONS; EQUILIBRIUM; EV RANGE 10-100; EXTREME ULTRAVIOLET RADIATION; FREE ELECTRON LASERS; IONIZATION; KINETIC ENERGY; MOLECULES; PEAKS; PHOTONS; PULSES; SPECTRA; BOSONS; CHARGED PARTICLES; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; EV RANGE; IONS; LASERS; MASSLESS PARTICLES; RADIATIONS; ULTRAVIOLET RADIATION

Citation Formats

Jiang, Y H, Kurka, M, Kuehnel, K U, Ergler, Th, Schroeter, C D, Moshammer, R, Rudenko, A, Foucar, L, Plesiat, E, Perez-Torres, J F, Martin, F, Herrwerth, O, Lezius, M, Kling, M F, Titze, J, Jahnke, T, Doerner, R, Sanz-Vicario, J L, Schoeffler, M, and Tilborg, J van. Tracing direct and sequential two-photon double ionization of D{sub 2} in femtosecond extreme-ultraviolet laser pulses. United States: N. p., 2010. Web. doi:10.1103/PHYSREVA.81.021401.
Jiang, Y H, Kurka, M, Kuehnel, K U, Ergler, Th, Schroeter, C D, Moshammer, R, Rudenko, A, Foucar, L, Plesiat, E, Perez-Torres, J F, Martin, F, Herrwerth, O, Lezius, M, Kling, M F, Titze, J, Jahnke, T, Doerner, R, Sanz-Vicario, J L, Schoeffler, M, & Tilborg, J van. Tracing direct and sequential two-photon double ionization of D{sub 2} in femtosecond extreme-ultraviolet laser pulses. United States. https://doi.org/10.1103/PHYSREVA.81.021401
Jiang, Y H, Kurka, M, Kuehnel, K U, Ergler, Th, Schroeter, C D, Moshammer, R, Rudenko, A, Foucar, L, Plesiat, E, Perez-Torres, J F, Martin, F, Herrwerth, O, Lezius, M, Kling, M F, Titze, J, Jahnke, T, Doerner, R, Sanz-Vicario, J L, Schoeffler, M, and Tilborg, J van. 2010. "Tracing direct and sequential two-photon double ionization of D{sub 2} in femtosecond extreme-ultraviolet laser pulses". United States. https://doi.org/10.1103/PHYSREVA.81.021401.
@article{osti_21408166,
title = {Tracing direct and sequential two-photon double ionization of D{sub 2} in femtosecond extreme-ultraviolet laser pulses},
author = {Jiang, Y H and Kurka, M and Kuehnel, K U and Ergler, Th and Schroeter, C D and Moshammer, R and Rudenko, A and Foucar, L and Plesiat, E and Perez-Torres, J F and Martin, F and Herrwerth, O and Lezius, M and Kling, M F and Titze, J and Jahnke, T and Doerner, R and Sanz-Vicario, J L and Schoeffler, M and Tilborg, J van},
abstractNote = {Two-photon double ionization (TPDI) of D{sub 2} is studied for 38-eV photons at the Free Electron Laser in Hamburg (FLASH). Based on model calculations, instantaneous and sequential absorption pathways are identified as separated peaks in the measured D{sup +}+D{sup +} fragment kinetic energy release (KER) spectra. The instantaneous process appears at high KER, corresponding to ionization at the molecule's equilibrium distance, in contrast to sequential ionization mainly leading to low-KER contributions. Measured fragment angular distributions are in good agreement with theory.},
doi = {10.1103/PHYSREVA.81.021401},
url = {https://www.osti.gov/biblio/21408166}, journal = {Physical Review. A},
issn = {1050-2947},
number = 2,
volume = 81,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 2010},
month = {Mon Feb 15 00:00:00 EST 2010}
}