Efficient long-term laser excitation of a collimated beam of potassium atoms on the D2 lineA. Gopalan, E. Leber, J. Bömmels, S. P.H. Paul, M. Allegrini, M.-W. Ruf and H. HotopEur. Phys. J. D, 30 2 (2004) 163-169DOI: https://doi.org/10.1140/epjd/e2004-00083-5