Photoionization cross-sections of the first excited states of sodium and lithium in a magneto-optical trapV. Wippel, C. Binder, W. Huber, L. Windholz, M. Allegrini, F. Fuso and E. ArimondoEur. Phys. J. D, 17 3 (2001) 285-291DOI: https://doi.org/10.1007/s100530170002