The impact broadening of the first potassium resonance lines by rubidium atoms

The authors have measured the absorption coefficient in the impact region of the first potassium resonance lines broadened by rubidium atoms. For the broadening constants gamma K*-Rb they have obtained the values (6.2+or-0.5)*10 -9 s -1 cm 3 /atom and (7.8+or-0.5)*10 -9 s -1 cm 3 /atom for the stronger and weaker components, respectively. The theoretical values calculated from the Lindholm formula are 6.0*10 -9 s -1 cm 3 /atom for the stronger and 7.0*10 -9 s -1 cm 3 /atom for the weaker component. The corresponding theoretical effective C 6 constants are 21.6*10 -30 s -1 cm 6 and 15.3*10 -30 s -1 cm 6 , respectively.