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2012•Journal of Physics Conference SeriesOpen access

Circular Dichrosim in Photoionization of H2and D2

J. F. Pérez‐Torres, D. Dowek, Y. J. Picard, P. Billaud, C. Elkharrat, C Houver, José Luis Sanz‐Vicario, Fernando Martı́n

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Abstract

In this work, circular dichroism in H 2 (D 2 ) photoionization is studied in detail. We have selected several photon energies for a case study: 19 eV for which only direct ionization to the 1 sσ g ionization channel is present, 27 eV where autoionization of Q 1 1 Σ + u doubly excited states takes place, and 32.5 eV for which autoionization from Q 1 and doubly excited states and direct ionization to 1 sσ g and 2 pσ u channels strongly interfere. The latter case shows clear evidence of different behavior of the photoionization against radiation helicity.

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What this paper is about

In this work, circular dichroism in H 2 (D 2 ) photoionization is studied in detail. We have selected several photon energies for a case study: 19 eV for which only direct ionization to the 1 sσ g ionization channel is present, 27 eV where autoionization of Q 1 1 Σ + u doubly excited states takes place, and 32.5 eV for which autoionization from Q 1 and doubly excited states and direct ionization to 1 sσ g and 2 pσ u channels strongly interfere. The latter case shows clear evidence of different behavior of the photoionization against radiation helicity.

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Available abstract

In this work, circular dichroism in H 2 (D 2 ) photoionization is studied in detail. We have selected several photon energies for a case study: 19 eV for which only direct ionization to the 1 sσ g ionization channel is present, 27 eV where autoionization of Q 1 1 Σ + u doubly excited states takes place, and 32.5 eV for which autoionization from Q 1 and doubly excited states and direct ionization to 1 sσ g and 2 pσ u channels strongly interfere. The latter case shows clear evidence of different behavior of the photoionization against radiation helicity.

Key concepts: Photoionization, Autoionization, Excited state, Ionization, Atomic physics, Photoionization mode, Physics, Circular dichroism

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