A magneto-optical trap for chromium with population repumping via intercombination linesA. S. Bell, J. Stuhler, S. Locher, S. Hensler, J. Mlynek and T. PfauEurophys. Lett., 45 2 (1999) 156-161DOI: https://doi.org/10.1209/epl/i1999-00140-7