Abstract:A new sub-Doppler fluorescence imaging method has been applied to study the laser ablation of B atoms at 248 nm with a power density of ∼1.7 × 10 8 W/cm 2 . Two-dimensional velocity distributions of the laserablated B( 2 P°1 /2,3/2 ) atoms are measured. The angular distributions of the ablated B atoms are velocitydependent; the higher the speed of the B atom is, the more centralized the distribution of the forward peaking will be, indicating that the ablation plume undergoes an unsteady adiabatic expansion. Th… Show more
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