Oscillator strength of the strongly "forbidden" Pb 6p2 3P0 → 6p2 3P1 transition at 1278.9 nm C. Vadla, V. Horvatic and K. Niemax Eur. Phys. J. D, 14 1 (2001) 23-25 Published online: 15 April 2001 DOI: 10.1007/s100530170229