CARS spectroscopy of the ($v=0\to 1$) band in ${\mathrm{T}}_2$

Abstract

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 ${\mathrm{T}}_2$, $\mathrm{HT}$ and $\mathrm{DT}$ have been limited. Here we present an accurate determination of ${\mathrm{T}}_2$ $Q(J=0-5)$ transition energies in the fundamental vibrational band of the ground electronic state, by means of high resolution Coherent Anti-Stokes Raman Spectroscopy. With the present experimental uncertainty of $0.02\mathrm{c}{\mathrm{m}}^{-1}$, which is a fivefold improvement over previous measurements, agreement with the latest theoretical calculations is demonstrated.

9 pages, 3 figures

References in corpus (1)

• Assessment of molecular effects on neutrino mass measurements from tritium beta decay

Cited by in corpus (4)

• Rovibrational energy levels of the hydrogen molecule through nonadiabatic perturbation theory
• Precision measurement of the fundamental vibrational frequencies of tritium-bearing hydrogen molecules: T${}_2$, DT, HT
• Nonrelativistic energy of tritium-containing hydrogen molecule isotopologues
• A Study of New Physics Searches with Tritium and Similar Molecules