Spectroscopy of even-parity autoionizing levels in Ba.
Using multiphoton ionization spectroscopy, we have observed transitions in Ba from the 6s(2)(1)S(0) ground state to even-parity autoionizing states. We have seen extended series with J = 0, 1, and 2 of the type 5dnd and 5dns, converging on the 5d(2)D(3/2) and (2)D(5/2) ionization limits. A multichannel quantum-defect theory analysis of the J = 0 spectrum is presented.
Wynne
J J
JJ
Hermann
J P
JP