Improved determination of the B–X and C–X transition wavelengths of molecular hydrogen

Authors

  • Edcel John Salumbides Department of Physics, University of San Carlos and Laser Centre, Vrije Universiteit Amsterdam
  • Denise Bailly Laboratoire de Photophysique Moléculaire · Université Paris-Sud
  • Kjeld S.E. Eikeme Laser Centre, Vrije Universiteit Amsterdam
  • Michel Vervloet Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin
  • Wim Ubachs Laser Centre, Vrije Universiteit Amsterdam

Abstract

We present two separate high precision spectroscopies of molecular hydrogen, one in the deep ultraviolet region and the other covering the infrared to visible spectral range. The combined results of the measurements enable an accurate determination of B–X (Lyman) and C–X (Werner) transition wavelengths, that are the most prominent H2 lines used in studies that probe for a possible variation of the proton-toelectron mass ratio (μ = mₚ /mₑ) over cosmological timescales. The accuracy obtained represent more than an order of magnitude improvement over previous determinations involving direct excitation of the Lyman and Werner transitions in the extreme ultraviolet region.

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Published

2010-10-25

How to Cite

[1]
EJ Salumbides, D Bailly, KS Eikeme, M Vervloet, and W Ubachs, Improved determination of the B–X and C–X transition wavelengths of molecular hydrogen, Proceedings of the Samahang Pisika ng Pilipinas 28, SPP-2010-5B-06 (2010). URL: https://proceedings.spp-online.org/article/view/SPP-2010-5B-06.