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MO: Molekülphysik

MO 12: Poster II

MO 12.25: Poster

Donnerstag, 27. März 2003, 16:00–18:30, Lichthof

Depletion modulation of Ar-H₂O in a supersonic planar plasma — •Harold Linnartz^1,2 and Dorinel Verdes¹ — ¹Departement Chemie, Universität Basel, Klingelbergstrasse 80, CH-4056 Basel — ²Fysische Chemie, FC-FEW-VU, De Boelelaan 1083, NL-1081 HV Amsterdam

A sensitive detection technique for tunable diode laser spectroscopy is presented that is suited to study rotationally resolved spectra of weakly bound complexes. The method uses a low energetic plasma source to achieve an efficient concentration modulation in a supersonic planar jet expansion. The method is demonstrated with rotationally resolved spectra of the Π(1₁₀) ← Σ(1₀₁) and Π(2₁₂) ← Σ(1₀₁) internal rotation/vibration bands of ortho Ar-H₂O in the ν₂ bend region of H₂O. The latter transition has not been reported before and is located at 1658.0309(6) cm⁻¹.
More information is available from D. Verdes and H. Linnartz, Chem. Phys. Lett. 355 (2002) 538.