Rydberg diamagnetism

Wintgen, D., Holle, A, Wiebusch, G., Main, J., Friedrich, H., and Welge, K.-H. (1986). Precision measurements and exact quantum mechanical calculations for diamagnetic Rydberg states in hydrogen, J. Phys. B 19, L557-L561. 

J.C. (1991). Diamagnetic Rydberg atom Confrontation of calculated and observed spectra, Phys. Rev. Lett. 66, 145-148. 

This is only strictly true if one neglects diamagnetic effects, which are quadratic in the magnetic field strength, a consideration which can become important for high Rydberg members (see chapter 10). 

Halley, Delande, and Taylor (34) used the combined R-matrix complex-coordinate technique to compute the diamagnetic Rydberg spectrum of reso-... 

Figure 60. Triplet amplitude of 6snp P, Rydberg states of Yb. The amplitudes were derived from hyperfine structure splittings (open squares), a five-channel quantum defect analysis using term values and hyperfine structure data (open circles), and measurements of diamagnetic shifts (crosses). (Taken from Ref. 46.)...

The electronic structure of Rydberg states can be probed by a large variety of atomic properties such as term values, lifetimes, oscillator strengths, Zeeman splitting factors. Stark and diamagnetic shifts, as well as... 

The dominant influence of the diamagnetic term of the potential (1) on high Rydberg states was first pointed out by Schiff and Snyder in 1937. Evidence of the wavefunction s concentration on the ridge emerged following the discovery of Landau resonances, from two remarks i) The major phenomena are restricted to states of even parity under the reflection 0->7T-0, which have an antinode at 0=90°. ii) The position of the Landau resonances is accounted for by a WKB treatment of one-dimensional motion along r at 0 = 900,10... 

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