2 research outputs found
Sub-collision hyperfine structure of nonlinear-optical resonance with field scanning
Some experimental evidences for methane are produced that the simple
transition from frequency scanning of nonlinear-optical resonances to magnetic
one may be accompanied with transition from sub-Doppler collisionally broadened
structure to sub-collision hyperfine one. It is conditioned by nonlinearity of
splitting of hyperfine sublevel for molecules in the adiabatically varied
magnetic field and respectively breaking the analogy of magnetic and frequency
scannings. The exact calculation of the resonance structure is considered for
molecules with only one spin subsystem. The approximately spin-additive
calculation of the structure is given for sufficiently fast rotating molecules
with greater number of spin subsystems. Within the same approximation an
example of hyperfine doubling in the magnetic and electric spectra of
nonlinear-optical resonance is considered for fluoromethane.Comment: 56 pages, 10 figures, accepted for publication in J. Mol. Spectrosc
Fast and efficient loading of a Rb magneto-optical trap using light-induced atomic desorption
We have obtained fast loading of a rubidium magneto-optical trap and very high collection efïŹciency by
capturing the atoms desorbed by a light ïŹash from a polydimethylsiloxane ïŹlm deposited on the internal
surface of a cell. The atoms are trapped with an effective loading time of about 65 ms at a loading rate greater
than 2 x 10^8 atoms per second. This rate is larger than the values reported in literature and is obtained by
preserving a long lifetime of the trapped atoms. This lifetime exceeds the ïŹlling time by nearly two orders of
magnitude. Trap loading by light-induced desorption from siloxane compounds can be very effectively applied
to store and trap a large number of atoms in the case of very weak atomic ïŹux or extremely low vapor density.
It can be also effectively used for fast production of ultracold atoms