Low-energy nondipole effects in molecular nitrogen valence-shell photoionization

Observations are reported for the first time of significant nondipole effects in the photoionization of the outer-valence orbitals of diatomic molecules. Measured nondipole angular-distribution parameters for the 3sigma(g), 1pi(u), and 2sigma(u) shells of N2 exhibit spectral variations with incident...

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Veröffentlicht in:Physical review letters 2006-09, Vol.97 (10), p.103006-103006, Article 103006
Hauptverfasser: Hemmers, O, Guillemin, R, Rolles, D, Wolska, A, Lindle, D W, Kanter, E P, Krässig, B, Southworth, S H, Wehlitz, R, Zimmermann, B, McKoy, V, Langhoff, P W
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container_end_page 103006
container_issue 10
container_start_page 103006
container_title Physical review letters
container_volume 97
creator Hemmers, O
Guillemin, R
Rolles, D
Wolska, A
Lindle, D W
Kanter, E P
Krässig, B
Southworth, S H
Wehlitz, R
Zimmermann, B
McKoy, V
Langhoff, P W
description Observations are reported for the first time of significant nondipole effects in the photoionization of the outer-valence orbitals of diatomic molecules. Measured nondipole angular-distribution parameters for the 3sigma(g), 1pi(u), and 2sigma(u) shells of N2 exhibit spectral variations with incident photon energies from thresholds to approximately 200 eV which are attributed via concomitant calculations to particular final-state symmetry waves arising from (E1)multiply sign in circle(M1,E2) radiation-matter interactions first-order in photon momentum. Comparisons with previously reported K-edge studies in N2 verify linear scaling with photon momentum, accounting in part for the significantly enhanced nondipole behavior observed in inner-shell ionization at correspondingly higher momentum values in this molecule.
doi_str_mv 10.1103/PhysRevLett.97.103006
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ispartof Physical review letters, 2006-09, Vol.97 (10), p.103006-103006, Article 103006
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source American Physical Society Journals
subjects ANGULAR DISTRIBUTION
ATOMIC AND MOLECULAR PHYSICS
E1-TRANSITIONS
E2-TRANSITIONS
INNER-SHELL IONIZATION
M1-TRANSITIONS
MATTER
NITROGEN
PHOTOIONIZATION
PHOTON BEAMS
PHOTONS
SYMMETRY
title Low-energy nondipole effects in molecular nitrogen valence-shell photoionization
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