Κβ resonant x-ray emission spectra in MnF2

We report experimental and theoretical results on Mn K beta resonant x-ray emission spectra (K beta RXES) at the pre-edge region of K-edge x-ray absorption spectroscopy in a powdered MnF2 sample. The experimental results are studied theoretically in terms of coherent second-order optical process, using a MnF6-4 cluster model with the effects of intra-atomic multiplet coupling and interatomic hybridization in the space of three configurations and taking into account both the Mn 1s-3d quadrupole excitation and the Mn 1s-4p dipole excitation. The agreement between theory and experiment is good. Moreover, we show that if the sample is a single crystal the resonant x-ray emission spectroscopy caused by the quadrupole excitation has a strong sensitivity to the angle of the incident photon.