Theoretical investigation of the X-ray photoabsorption spectrum of Potassium near K, KN and KM edges: Transition probabilities for single and double electron excitations

We present new calculations for the transition probabilities and transition energies for single electron K shell excitations and double electron KN and KM shell excitations in atomic Potassium in the energy range 3610-3650 eV. The calculations were carried out to investigate the X-ray photoabsorption spectrum of atomic Potassium using Multi-configurational Dirac-Hartee Fock method. The transition probabilities were convoluted in Lorentzian line shapes, a rough estimate of the effect of photoionization was also taken into account, comparison of the calculations with previous measurements of the X-ray photoabsorption spectrum of atomic Potassium near K, KN and KM edges showed relatively good agreement.