MOTIONAL STARK EFFECT ON LI VAPOR PHOTOABSORPTION IN HIGH MAGNETIC-FIELDS

Calculation of the motional Stark effect for B50 kG shows it to become dominant along Rydberg series of light elements at T1000°C before the diamagnetic shift changes the spectrum from Rydberg to Landau type, thus accounting for the 12c spacing observed in Li. This spacing is preserved when both of the competing effects motional Stark and Landau modulationare strong. The spectrum appears to depend critically on the relative position of the thresholds for the onset of the two effects. © 1979 The American Physical Society.