Coherent cascade of X-ray transitions excited by synchrotron radiation in crystals

Abstract

The coherent excitation of an X-ray cascade of atomic radiative transitions by synchrotron radiation (SR) in a single crystal is theoretically examined. It is shown that in the coherent channel of the process the structure of the single crystal essentially influences the angular distribution of quanta emitted in the last transition of the cascade. Possibilities of experimental observation of the excitation by SR of the coherent X-ray cascade are briefly discussed and differences between the coherent X-ray and coherent Mössbauer gamma-cascades are noted.