Energy pooling collision cross-section measurements in Indium: the In(6S1/2) + In(6S1/2) In(n P) + In(5P3/2) process

The quantitative investigation of the energy pooling collision (EPC) process between resonantly laser excited In atoms is reported. The process is studied in a laser induced fluorescence (LIF) experiment where the nP populations, with n=11, 10 and 9, are monitored. The population mechanism for these levels is verified via a temporal analysis of the fluorescence signals. This is possible in In due to the strongly reduced self trapping of the resonant radiation. The cross section for energy pooling collision to these nP levels has been derived by considering the Rydberg character of these levels

Two-color CPT in a Single Cs Hyperfine Transition, Application in Magnetometry

We investigate the coherent population trapping effect occurring between the Zeeman sublevels of a given hy- perfine state of Cs when excited by a single-mode diode laser, which is frequency modulated in the kHz­MHz range. In the presence of a dc magnetic field, simultaneous excitation of pairs of ground-state magnetic sublevels to common excited mag- netic sublevels is performed. As a result, coherent population trapping resonance is detected at only a given modulation fre- quency, whose value gives a measure of the magnetic field. The parameters of the resonances are measured in order to determine the ultimate accuracy of the magnetic field measurement