Decay of 83-minBa139to levels ofLa139and the decay of 18-minBa141to levels ofLa141

The level structures of odd proton ${}_{}{}^{139}{}_{}{}^{}\mathrm{La}$ and ${}_{}{}^{141}{}_{}{}^{}\mathrm{La}$ have been studied in γ-ray singles, Compton-suppressed singles, coincidence, and angular correlation experiments. No evidence was observed to support the existence of any levels in ${}_{}{}^{139}{}_{}{}^{}\mathrm{La}$ in the gap between the 166-keV $d_{5/2}$ level and the 1209-keV ${\mathrm{}(1/2)\mathrm{}}^{+}$ level, even though data were accumulated long enough to observe indirect feeding of the ${\mathrm{}(1/2)\mathrm{}}^{+}$ level. Additional spin and parity assignments are suggested for a number of levels in ${}_{}{}^{141}{}_{}{}^{}\mathrm{La}$ based on angular correlation measurements.