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Observation of an (N+ - N = 4) ro-vibrational transition in the photoionization of D2 (Articolo in rivista)

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Observation of an (N+ - N = 4) ro-vibrational transition in the photoionization of D2 (Articolo in rivista) (literal)

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A M Juarez1, E Sokell2, P Bolognesi3, M R F Siggel-King4, G C King5, M de Simone3 and M Coreno3,6 (2006)
Observation of an (N+ - N = 4) ro-vibrational transition in the photoionization of D2
in Journal of physics. B, Atomic molecular and optical physics (Print)
(literal)

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A M Juarez1, E Sokell2, P Bolognesi3, M R F Siggel-King4, G C King5, M de Simone3 and M Coreno3,6 (literal)

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1 Centro de Ciencias Físicas, UNAM, Av. Universidad S/N col. Chamilpa, Cuernavaca, Morelos, Mexico 2 School of Physics, University College Dublin, Belfield, Dublin 4, Ireland 3 CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo, Italy 4 CCLRC Daresbury Laboratory, Keckwick Lane, Cheshire, WA4 4AD, UK 5 School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK 6 INFM-TASC, Basovizza, I-34012, Trieste, Italy and Unità INSTM, Univ. Trieste, Italy (literal)

Titolo

Observation of an (N+ - N = 4) ro-vibrational transition in the photoionization of D2 (literal)

Abstract

We present high-resolution photoelectron spectra (PES) of D-2 in the photon energy range from 15.648 to 15.677 eV. This range encompasses autoionizing Rydberg states of D-2 converging on various vibrational levels of the X-2 Sigma(+)(g) state of the D-2(+) ion. The PES show features that correspond to the transitions, D2X1 Sigma(g)(v = 0, N = 0) -> (D2+X2)Sigma(+)(g)(v(+) = 0, N+ = 0, 2, and 4). This is the first time that a change of Delta N = N+ - N = 4 in rotational angular momentum has been reported in a PES, where the magnetic field was negligible ( less than a few milligauss). The autoionizing state giving rise to the Delta N = 4 transition is observed at a photon energy of 15.674 eV and is assigned to the R(2) n = 5p pi Rydberg state converging to the v(+) = 4 vibrational level of the D-2(+) ion. It is suggested that the large change in rotational angular momentum results from the relatively long lifetime of this state. (literal)

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