Rotationally resolved photoelectron spectroscopy of hot N2 formed in the photofragmentation of N2O

Abstract

Articles you may be interested inThe photoionization dynamics of rotationally hot molecular nitrogen are studied employing resonance enhanced multiphoton ionization in combination with photoelectron spectroscopy. Photodissociation of N 2 O at ϳ203 nm results in highly rotationally excited N 2 fragments in X 1 ͚ g ϩ (NЉ,vЉϭ0,1) states and O atoms in the excited 1 D 2 state. Photoelectron detection of the rotationally hot N 2 states is performed by a two-photon excitation to the lowest aЉ 1 ͚ g ϩ Rydberg state followed by one-photon ionization. The large number of observed rotational levels, from NЈ ϭ49 up to NЈϭ94, results in improved rotational parameters for aЉ 1 ͚ g ϩ (vЈϭ0). In addition, experimental and theoretical rotationally resolved photoelectron spectra of the aЉ 1 ͚ g ϩ (vЈ ϭ0,1;NЈ) state are presented. In these spectra only ⌬NϭN ϩ ϪNЈϭeven transitions are observed, with a dominant ⌬Nϭ0 peak and rather weak ⌬NϭϮ2 peaks. The one-photon ionization is dominated by ejection of electrons in p and f partial waves. The agreement between experimental and calculated spectra is excellent.

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Photodissociation of nitrous oxide starting from excited bending levels

“…4͑d͒ shows a clear anisotropic angular distribution that is expected for photoelectron angular distribution in one-photon ionization from the aЉ 1 ⌺ g + 3s Rydberg state of N 2 . 18 The reason the splitting was discernible only in the direction parallel to the laser polarization ͓Fig. 3͑a͔͒ is that a photoelectron is ejected parallel to the laser polarization, thereby providing a recoil kick to N 2 + in this direction.…”

Rotationally resolved photoionization: Influence of the 4σ→kσ shape resonance on CO+(B 2Σ+) rotational distributions

“…17-22,38 -52 A related method is to employ REMPI coupled with photoelectron spectroscopy. 26,27,[53][54][55][56][57] The resolution is not quite as high for such experiments, but the capability of determining angularly resolved photoelectron maps is extremely powerful. Indeed, this photoelectron mapping has developed into a useful tool for determining the angular momentum composition of the photoelectron wave function, as well as for studying the intramolecular ''alignment evolution'' dynamics.…”