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Precision spectroscopic measurements in H2, H2+, He2 and He2+(Prof. Merkt)

  • Date: Jun 19, 2018
  • Time: 14:30 - 15:30
  • Speaker: Prof. Dr. Frédéric Merkt
  • Department of Chemistry and Applied Biosciences , ETH Zürich, Schweiz
  • Room: New Lecture Hall, Room B 0.32
  • Host: MPQ
Few-electron molecules represent attractive systems for precision spectroscopy because their properties can be calculated with extraordinary accuracy by ab initio quantum-chemical methods.

Comparing experimental and theoretical results thus offers the opportunity to assess the limitations of ab initio calculations, ultimately and ideally at the level where their accuracy is limited by either the uncertainties of the fundamental constants or so far unrecognized physical effects. We present the results of precision measurements in cold samples of hydrogen (H2) and metastable He2 molecules. The cold-molecule samples are prepared in supersonic beams using pulsed cryogenic valves and, in the case of metastable He2, a multistage Zeeman decelerator.

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