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MO: Fachverband Molekülphysik
MO 8: Poster 1
MO 8.12: Poster
Dienstag, 15. März 2022, 16:30–18:30, P
Doppler-free spectroscopy of the A 2Σ+ ← X 2Π3/2 transition in nitric oxide — •Philipp Neufeld1, Patrick Kaspar1, Fabian Munkes1, Lea Ebel1, Yannick Schellander2, Robert Löw1, Tilman Pfau1, and Harald Kübler1 — 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart — 2Institut für Großflächige Mikroelektronik, Universität Stuttgart
On the A 2Σ+ ← X 2Π3/2 transition in nitric oxide (NO) we employ Doppler-free spectroscopy for different total angular momenta J on the P12 branch. Via phase sensitive detection by a lock-in amplifier the hyperfine structure of the X 2Π3/2 state of NO is partially resolved. The data is compared to previous measurements [1]. On the H 2Σ+ ← A 2Σ+ transition, optogalvanic spectroscopy is performed [2]. Both transitions are driven in continuous wave operation at 226 nm and 540 nm, respectively.
Investigation of the dependence of the spectroscopic feature on power and pressure, should yield hyperfine constants, natural transition linewidth and the collisional cross-section between NO molecules. The novel approach of optogalvanic spectroscopy has the potential to facilitate the investigation of the structural details of H 2Σ+.
[1] W.L. Meerts and A. Dymanus, J. of Mol. Spec. 44, 320-346 (1972)
[2] P. Kaspar et. al., OSA Optical Sensors and Sensing, 19-23 July, 2021