Abstract
Theoretical study of γ-ray inelastic scattering by K -shell electrons for the case of q a ∼1 is presented, where \(\hbar q\) is the momentum transfer of the primary γ-ray and a is the orbital radius of the K -shell electron. Details of calculation for the contribution of A 2 -term to the scattering, A being the vector potential, are given a using a single orthogonalized plane wave for the wave function in the scattering state. The present theoretical result is compared with the experimental one obtained by Namikawa and Hosoya (NH) (Phys. Rev. Lett. 53 (1984) 1606): scattering of 59.57 keV γ-rays by K -shell electrons of Cu and Fe. The C peak and R peak found experimentally by NH are reproduced theoretically though the height of the R peak is 1/3 of that of the experimental result by NH.
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