Nondivergent radiation of discrete frequencies in continuous x-ray spectrum

I have observed a strong nondivergent beam of radiation from targets with cylindrical bores, emitted in a direction parallel to the target face, when electrons strike the target at grazing angles. The spectroscopic analysis has so far revealed six discrete bands in the range 350-20 keV, which agree well with my predicted values. The theory of bremsstrahlung apparently does not account for the high intensity in the forward direction or for the discrete frequencies of the radiation.