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Hf Transition Probabilities and Abundances
J. E. Lawler, E. A. Den Hartog, Z. E. Labby +3
Radiative lifetimes from laser-induced fluorescence measurements, accurate to about +/- 5 percent, are reported for 41 odd-parity levels of Hf II. The lifetimes are combined with b…
r-Process Enhanced Halo Stars
J. J. Cowan, C. Sneden, J. E. Lawler +1
Abundance observations indicate the presence of rapid-neutron capture (i.e., r-process) elements in old Galactic halo and globular cluster stars. These observations provide insight…
Gd Transition Probabilities and Abundances
E. A. Den Hartog, J. E. Lawler, C. Sneden +1
Radiative lifetimes, accurate to +/- 5%, have been measured for 49 even-parity and 14 odd-parity levels of Gd II using laser-induced fluorescence. The lifetimes are combined with b…
Sm Transition Probabilities and Abundances
J. E. Lawler, E. A. Den Hartog, C. Sneden +1
Radiative lifetimes, accurate to +/- 5%, have been measured for 212 odd-parity levels of Sm II using laser-induced fluorescence. The lifetimes are combined with branching fractions…