Level anticrossing effects

Level Anticrossing and Cross-Relaxation Effects A. The Level Anticrossing Experiment Cross-Relaxation Effects Microwave Studies Radiofrequency Studies Lifetime Measurements VI. Coherence Experiments A. The Rotating Frame Free Precession Spin Echoes... 

Fig. 9.1 Diamagnetic structure of Na. (a) Experimental excitation curves for even parity levels, m = 1, ms = i, in the vicinity of n = 28. A tunable laser was scanned across the energy range displayed. The zero of energy is the ionization limit. Signals generated by ionizing the excited atoms appear as horizontal peaks. The horizontal scale is quadratic in field. Calculated levels are overlaid in light lines. Some discrepancies are present due to nonlinearity of the lasers, (b) Calculated excitation curves, displayed linearly in field, (c) Same as (b), but for even parity m = 0 states. Note the large effect on anticrossings due to the presence of the nondegenerate s states (from ref. 7).

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