Measurement of the photoionization cross-section of the 3p 2P1/2,3/2 excited levels of sodium N. Amin, S. Mahmood, M. Anwar-ul-Haq, M. Riaz and M. A. Baig Eur. Phys. J. D, 37 1 (2006) 23-28 Published online: 27 September 2005 DOI: 10.1140/epjd/e2005-00261-y