Simulation of the hyperfine-resolved Zeeman spectrum of Eu atoms in a magnetic trap

We present a simulation of the laser absorption spectra of Eu atoms in the a S7/22y P7/2 band at 462.7 nm measured previously in a buffer-gas-loaded magnetic trap @J. Kim et al., Phys. Rev. Lett. 78, 3665~1997!#. The simulations of the hyperfine-resolved Zeeman spectra are based on exact magnetic eigenproperties of the states involved, and yield a complete assignment of all the features observed. This reveals that apart from the MJ 57/2 state and its hyperfine substates, the MJ55/2 and 3/2 states are also trapped at Bmax50.52 T and a temperature of about 250 mK.