Abstract
•New calculations for the transition rates and energies for single electron K shell excitations in the energy range 3610–3650 eV are presented.•Double electron KN and KM shell excitations in atomic Potassium in the energy range 3610–3650 eV are also determined.•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 taking into account a rough estimate of the effect of photoionization.•A Comparison with previous measurements of the X-ray photoabsorption spectrum of atomic Potassium near K, KN and KM edges is presented.
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.