K shell parameters of some lanthanide elements using bremsstrahlung

• Bremsstrahlung attenuation in Tb and Ho targets is measured.
• At K edge a sharp decrease in intensity is used to determine the K shell parameters.
• The K x-ray photons appear just below the K edge hinders the precise measurement.
• This hindrance is avoided using monochromatic gamma source.
• Measured values are compared with those obtained from FFAST tabulations.

The spectrum of external bremsstrahlung (EB) transmitted through Tb and Ho is measured using a HPGe detector spectrometer. A sudden drop in transmitted intensity at K shell binding energy has been used to determine the K shell photoelectric parameters. The unwanted characteristic K x-ray photons generated just below the K edge has been avoided by carrying out a separate experiment in the same geometry. The measured values of K shell parameters have been compared with FFAST values.