TY - JOUR
T1 - Probing doubly excited ionic states of [Formula Presented] via a triple excitation above the N [Formula Presented] threshold in the [Formula Presented] molecule
AU - Feifel, R.
AU - Ueda, K.
AU - De Fanis, A.
AU - Okada, K.
AU - Tanimoto, S.
AU - Furuta, T.
AU - Shindo, H.
AU - Kitajima, M.
AU - Tanaka, H.
AU - Björneholm, O.
AU - Karlsson, L.
AU - Svensson, S.
AU - Sorensen, S. L.
PY - 2003
Y1 - 2003
N2 - Angle-resolved resonant Auger-electron spectroscopy has been carried out on the nitrogen molecule at selected photon energies around 419 eV, where a [Formula Presented] core electron and two valence electrons are promoted into the lowest unoccupied molecular orbital [Formula Presented] Significant enhancement of a specific band, which cannot be disentangled in direct photoionization, is observed at a binding energy of 37.6 eV, with a value of the anisotropy parameter [Formula Presented] much smaller than 2. We assign this new band to the transition to a doubly excited cationic state of [Formula Presented] in which two of the excited valence electrons remain in the [Formula Presented] orbital, proposing a “double spectator” type decay mechanism. This observation shows how to preferentially probe multiply excited configurations of cations using multiple resonant excitation.
AB - Angle-resolved resonant Auger-electron spectroscopy has been carried out on the nitrogen molecule at selected photon energies around 419 eV, where a [Formula Presented] core electron and two valence electrons are promoted into the lowest unoccupied molecular orbital [Formula Presented] Significant enhancement of a specific band, which cannot be disentangled in direct photoionization, is observed at a binding energy of 37.6 eV, with a value of the anisotropy parameter [Formula Presented] much smaller than 2. We assign this new band to the transition to a doubly excited cationic state of [Formula Presented] in which two of the excited valence electrons remain in the [Formula Presented] orbital, proposing a “double spectator” type decay mechanism. This observation shows how to preferentially probe multiply excited configurations of cations using multiple resonant excitation.
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U2 - 10.1103/PhysRevA.67.032504
DO - 10.1103/PhysRevA.67.032504
M3 - Article
AN - SCOPUS:85037220848
VL - 67
SP - 4
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 3
ER -