Oscillations in Absorption Spectra of Atoms in Magnetic Fields

Ho Seong Lee, Sang Eon Park, Sung Hoon Yang

Saturated absorption spectra of the /sup 87/Rb atom under the magnetic field of several tens of gauss were observed with a diode laser oscillating at 780 nm, and Zeeman splittings of the 5/sup 2/P/sub 3/2/ excited state of the atom were numerically calculated to obtain the spectra theoretically. Both of the spectra agreed well, and a Zeeman-shifted absorption line was used for the frequency stabilization of the diode laser.>

E. Arimondo, D. Ciampini, Carlo Rizzo

Ho Seong Lee, Sung Hoon Yang, Young Bum Kim +3 more

We observed saturated absorption spectra of the 87Rb atom under a magnetic field of several millitesla with a diode laser oscillating at 780 nm. The spectra were compared with the theoretical ones obtained on the basis of Nakayama's four-level model. We numerically computed Zeeman splittings of the 52 P 3/2 excited state of the atom. As the magnetic field increased to 5 mT, the absorption peak of the F=2→F'=3 transition shifted almost linearly up to about 62 MHz. The shift direction was reversed by changing the polarization combination of the pump and probe lasers. The measured frequency stability, when the laser was locked at the absorption peak, was better than σy(τ)= 1 ×10-11τ-1/2 for the sampling time of 0.01 s≤τ≤10 s.

Gora V. Shlyapnikov, I. P. Shmatov

Alexander Y. Potekhin

Analytical approximations are constructed for binding energies, quantum-mechanical sizes and oscillator strengths of main radiative transitions of hydrogen atoms arbitrarily moving in magnetic fields - . Examples of using the obtained approximations for determination of maximum transverse velocity of an atom and for the evaluation of absorption spectra in magnetic neutron-star atmospheres are presented.

A. A. Kiselev, A. V. Lyaptsev