Abstract: Hydrogen (deuterium) gas discharge source was used to bombard target of non-crystalloid deuterate polyethylene polymethylmethacrylate, etc. The scattering spectrum was measured. There are several sharp X-ray spectral lines on the scattering spectrum, but the primary spectrum of the discharge does not include these lines of the scattering spectrum. It is confirmed that they are neither the characteristic X-ray of C, O or other possible impurity element, nor diffractive spectral lines, nor the “absorption cut off” of electron bremsstrahlung spectrum. It is most likely that they are a kind of X-ray spectral series of new kind of atom state. A new theory model called small hydrogen atom was put forward to explain the spectrum. It assumes that the discharge of hydrogen gas will produce small