(American Physical Society (APS), 2000) Cai, Long; Friedrich, Bretislav; Doyle, John
We present a simulation of the laser absorption spectra of Eu atoms in the a 8S7/22y 8P7/2 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
(American Physical Society (APS), 2002) Egorov, Dima; Lahaye, Thierry; Schöllkopf, Wieland; Friedrich, Bretislav; Doyle, John
We demonstrate direct loading and cooling of a thermal beam into a cryogenic helium buffer gas. Our test species is rubidium; we observe a thermal beam with 3x10^13 s^-1 flux entering a cryocell and thermalizing with a 4.2-K buffer gas. There is no evidence of clustering or other spurious loss mechanisms. The cooling technique should be applicable to a wide variety of species, including radicals.
