Collinear Laser Spectroscopy (CLS) has been used to investigate basic nuclear properties such as nuclear spin, electromagnetic moment, and mean-square charge radii for the radioctive isotopes produced by accelerator facilities.
For the RAON CLS experiment, tunable lasers essential to study various atom currently, are prepared, which are dye laser and Ti:Sa laser and their second harmonics repectively. In this report, using one of these, Ti:Sa laser, the spectrum of D1 and D2 lines of 85Rb, 87Rb, and 137Cs atoms were obtained by saturation absorption spectroscopy, which is one of the high-resolution spectroscopic techniques. For CLS, the laser frequency line width should be narrow and the laser should be stable at a specific frequency for a long time. Therefore, the frequency stability was measured using the spectral signal.
In addition, a detailed analysis was performed on the power broadening that should be considered in the interaction between atoms and lasers. The measured hyperfine structure will be compared with ab-inito calculation using relativistic atomic structure code, multi-configuration Dirac-Fock .