Rotationally resolved photoelectron spectroscopy of hot N 2 formed in
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چکیده
Articles you may be interested in Communication: Ultrafast time-resolved ion photofragmentation spectroscopy of photoionization-induced proton transfer in phenol-ammonia complex Detection of " ended " NO recoil in the 355 nm NO 2 photodissociation mechanism The 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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