Radiative lifetimes of highly excited odd-parity levels of neutral lanthanum

New radiative lifetimes of 24 high-lying odd-parity levels of neutral lanthanum are reported using time-resolved laser-induced fluorescence (TR-LIF) spectroscopy. The investigated levels ranging from 34 213 to 40 910 cm^-1 were excited from the ground or metastable states using one-photon excitation. La atoms are produced by laser ablation on a solid La sample. The lifetimes were evaluated from transient LIF signals detected with a fast detection system. The obtained lifetime results, generally with uncertainties less than  ±7%, are in the range from 15.7 to 121 ns.