Metastability exchange optical pumping of 3He at high pressure and high magnetic field for medical applicationsA. Nikiel, T. Palasz, M. Suchanek, M. Abboud, A. Sinatra, Z. Olejniczak, T. Dohnalik, G. Tastevin and P-J. NacherEur. Phys. J. Special Topics, 144 (2007) 255-263DOI: https://doi.org/10.1140/epjst/e2007-00138-3