Erlangen 2018 – scientific programme
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MO: Fachverband Molekülphysik
MO 7: High Resolution Spectroscopy
MO 7.2: Talk
Monday, March 5, 2018, 16:30–16:45, PA 1.150
High-Resolution CARS Spectroscopy of the T2 molecule — •Magnus Schlösser1, Xiaodong Zhao1, Madhu Trivikram2, Wim Ubachs2, and Edcel J. Salumbides2 — 1Tritium Laboratory Karlsruhe, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany — 2LaserLaB and Department of Physics and Astronomy, Vrije Universiteit, Amsterdam, The Netherlands
Molecular hydrogen is a benchmark system for bound state quantum calculation and tests of quantum electrodynamical effects. While spectroscopic measurements on the stable species have progressively improved over the years, high-resolution studies on the radioactive isotopologues T2, HT and DT have been limited. For this reason, we have built a high-resolution coherent anti-Stokes Raman spectroscopy system using nano-second pulses at the LaserLab Amsterdam and equipped it with a specially designed gas cell filled with <1 GBq of T2 from the Tritium Laboratory Karlsruhe. Here, we present an accurate determination of T2 (Q(J=0…5)) transition energies in the fundamental vibrational band of the ground electronic state, With the present experimental uncertainty of 0.02 cm−1, which is a fivefold improvement over previous measurements, agreement with the latest theoretical calculations is demonstrated.