Abstract
We report two-color photo-associative ionization of sodium
in a Magneto-Optical Trap. The experimental results yield
information on both singly and doubly excited states. We
find that the highest bound vibrational levels (v > 20) of
the singly-excited 0^- g state predissociate into the 3²P3/2 +
3^²S½(Fg=1) dissociation continuum due to avoided cross-
ings of the hyperfine
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