Cc. Tsai et al., OPTICAL-OPTICAL DOUBLE-RESONANCE SPECTROSCOPY OF THE (1)SIGMA(G)+ SHELF STATES AND (1)PI(G) STATES OF NA2 USING AN ULTRASENSITIVE IONIZATION DETECTOR, Physical review letters, 71(8), 1993, pp. 1152-1155
Using a shielded cylindrical space-charge-limited diode ionization det
ector and optical-optical double resonance, the exotic potential energ
y curves of the 3, 4, 5, and 6 1SIGMA(g)+ ''shelf'' states and 2 and 3
1PI(g) states of Na2 have been extensively studied including levels n
ear dissociation (> 99.8% of well depth) with very large outer classic
al turning points, and long range avoided crossings giving rise to pot
ential ''shelfs.'' The long range potentials can all be understood and
also provide stringently tested high quality theoretical calculations
of highly excited states.