The differential cross section for elastic scattering of an X-ray photon by
the molybdenum atom is calculated in the region of the ionization threshol
d of the 1s shell. The calculation is performed in the nonrelativistic appr
oximation taking into account the rearrangement of electron shells of the a
tomic core in the field of the virtual 1s vacancy and processes of one-phot
on virtual excitation (ionization) of the ground state. Good agreement with
experimental results is obtained (C) 2000 MAIK "Nauka/Interperiodica".