Cesium oscillator strengths measured with a multiple-path-length absorption cell

Absorption-oscillator-strength measurements for the principal series in cesium were measured using a multiple-path-length cell. The optical arrangement included a movable transverse path for checking the uniformity of the alkali density along the length of the cell and which also allowed strength measurements to be made simultaneously on both strong and weak lines. The strengths measured on the first 10 doublets indicate an increasing trend in the doublet ratio. The individual line strengths are in close agreement with the high resolution measurements of PICHLER⁽⁹⁾ and with the calculations of NORCROSS.⁽¹⁰⁾