München 2004 – wissenschaftliches Programm
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MO: Molekülphysik
MO 17: Poster II
MO 17.11: Poster
Donnerstag, 25. März 2004, 14:00–16:00, Schellingstr. 3
Photodissociation processes of Rydberg states in N2 in the exciting-photon energy ranges between 23 eV to 24.3 eV and 25.6 eV to 26.7 eV — •Lutz Werner1, Sebastian Lucht1, Stephan Klumpp1, Hans Schmoranzer1, Arno Ehresmann1, Sven Kammer2, Sascha Sukhorukov2, Rüdiger Schill2, and Karl-Heinz Schartner2 — 1Technische Universität Kaiserslautern — 2I. Physikalisches Institut Justus Liebig Universität Giessen
It has been recently shown that neutral photodissociation of the O2 (c4 Σu−)nlλ 3Σu−,(v=0,1) and the CO (4Σu−)nsσg Σu−Rydberg states are state selective. They dissociate into neutral fragments where one of the fragments is in a Rydberg state as well and where the effective principal quantum number of the Rydberg electron is conserved. N2 Rydberg states (C2 Σu+)nsσ (v) were investigated using monochromized synchrotron radiation to clarify whether such a behavior can also be observed in N2. Dispersed fluorescence from excited NI fragments in the spectral ranges from 114 nm to 135 nm and simultaniously from 82 nm to 102 nm in the exciting-photon energy range from 23 eV to 24.3 eV and 25.6 eV to 26.7 eV was investigated. The exciting photon energy range was chosen such that it lies just beneath the thresholds for dissociative ionisation into the fragments NII(3P)+NI(4S) and NII(3P)+NI(2D). In this exciting energy regions intensities from NI fragment fluorescence transitions 2p2(3P)3s 4P→2p3 4S, 2p2(3P)3d 2P→2p3 4S and from transitions in the VUV-region 2p2(3P)nd and 2p2(3P)ns were measured as functions of the exciting-photon energy with the very narrow bandwidth of 2meV.