[en] The lifetimes of some levels of the 4d55p and 4d45s5p configurations have been determined by zero-field level-crossing technique. The results are: 4d55p: tau(7P4) = 14.4(8) ns; tau(7P3) = 15.8(8) ns; tau(7P2) = 13.6(7) ns. 4d45s5p: tau(7P4) = 5.7(6) ns; tau(7P3) = 10.2(5) ns; tau(7P2) = 6.0(5) ns; tau(7D3) = 12.1(10) ns; tau(7D2) = 8.2(8) ns. (Auth.)