Energy-dispersive measurement ofKαx-ray linewidths and relative intensities

The natural linewidths $\Gamma$ and component intensity ratios $\frac{K{\alpha }_2}{K{\alpha }_1}$ are determined using Ge(Li) spectroscopy for four $K\alpha$ x-ray doubles in the range $70\le Z\le 82$. The necessary spectrum-fitting techniques employ two different approaches to convolute the intrinsic Lorentzian profiles with the detector resolution function. The forbidden $K{\alpha }_3$ transition is seen in Ge(Li) spectra for the first time. All results agree closely with Scofield's relativistic Hartree-Fock-Slater calculations.