  Equilibrium constants for Hydrogen and Helium isotopes as a function of
density and temperature are measured in the framework of the study made by Qin
et al. [Qin L et al 2012 Phys. Rev. Lett. 108 172701]. We review and comment on
all stages of the analysis and conclude that our measurements are not
inconsistent with Qin et al. results. Improvements are being made to the
initial analysis and we raise the issue of the binding energies which has to be
clarified.
