https://www.selleckchem.com/pr....oducts/poly-d-lysine
Two lowest-energy odd-parity atomic levels of actinium, 7s^27p^2P_1/2^o, 7s^27p^2P_3/2^o, were observed via two-step resonant laser-ionization spectroscopy and their respective energies were measured to be 7477.36(4) and 12 276.59(2) cm^-1. The lifetimes of these states were determined as 668(11) and 255(7) ns, respectively. In addition, we observed the effect of the hyperfine structure on the line for the transition to ^2P_3/2^o. These properties were calculated using a hybrid approach that combines configuration in