Possible narrowing of Compton line breadth by preferentially directed electron momenta in Ceylon graphite

According to a theory of the author first published in Phys. Rev. 33, 643 (1929), the considerable natural spectral breadth of the Compton modified line was ascribed to the initial momenta of electrons in the scattering body and as one consequence a mathematical expression was derived for the behavior of this breadth as a function of the primary wavelength and scattering angle (formula 23, page 657, above article).