Optical measurement of 3He nuclear polarization for metastable exchange optical pumping studies at high magnetic fieldK. Suchanek, M. Suchanek, A. Nikiel, T. Pałasz, M. Abboud, A. Sinatra, P.-J. Nacher, G. Tastevin, Z. Olejniczak and T. DohnalikEur. Phys. J. Special Topics, 144 (2007) 67-74DOI: https://doi.org/10.1140/epjst/e2007-00109-8