Photoionization processes in NO in the threshold region

Erman, P.; Karawajczyk, A.; Rachlew-Källne, E.; Stankiewicz, Marek; Franzen, K. Y.; Sannes, P.; Veseth, L.

doi:10.1016/s0009-2614(97)00551-4

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…The term value of this state is 106 735 (~13.3 eV), which is ~4eV above the threshold of the first ionization continuum (~9.26 eV). This term value belongs to one of those super-excited states that have recently been investigated exciting NO (with the photon energies of 9–35 eV) using high-order harmonic laser or synchrotron lights 11,12,23–27. The nearby super-excited Rydberg 2 Σ + state with the extremely sharp intense line, located at the energy of 13.818 eV, has been observed with the angle-resolved constant-ionic-state (CIS) technique, using one-photon excitation from the ground state 12,27.…”

Section: Resultsmentioning

confidence: 99%

“…The term value of this state is 106 735 (∼13.3 eV), which is ∼4 eV above the threshold of the first ionization continuum (∼9.26 eV). This term value belongs to one of those super-excited states that have recently been investigated exciting NO (with the photon energies of 9−35 eV) using high-order harmonic laser or synchrotron lights. ,,− The nearby super-excited Rydberg 2 Σ + state with the extremely sharp intense line, located at the energy of 13.818 eV, has been observed with the angle-resolved constant-ionic-state (CIS) technique, using one-photon excitation from the ground state. , Salzmann et al reported that the autoionization via this resonant Rydberg excitation leads to a 10-fold increase of the ionization cross section . This enhanced autoionization mechanism may explain why we can observe ion signal from this new Rydberg 2 Σ + state.…”

Section: Resultsmentioning

confidence: 99%

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Rotational Structure of a Super-Excited State of the NO Molecule Revealed by OODR-Multiphoton Laser Spectroscopy

et al. 2009

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The optical-optical double resonance time of flight (OODR-TOF) spectroscopy technique was employed to examine the 65 000-66 500 cm -1 region of the nitric oxide spectrum. In this region, we detected the following three electronic states: E 2 Σ + (ν = 2) (Rydberg state), B 2 Π (ν = 23) (valence state), and L 2 Π (ν = 4) (valence state). The rotational structure analysis of an unexpected band in the red part of the spectra revealed the presence of a new super-excited 2 Σ + Rydberg state at ~13.3 eV, which was populated through a three-photon transition from the intermediate A 2 Σ + (ν = 0) state. This super-excited state converges to the NO (a 3 Σ + ) ionic state with electronic configuration (1σ) 2 (2σ) 2 (3σ) 2 (4σ) 2 (5σ) 2 (1π) 3 (2π) 1 (3sσ) 1 .

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