Electron scattering on hydrogen and deuterium molecules at 14–25 keV by the “Troitsk nu-mass” experiment

This work describes an investigation of electron scattering on molecular hydrogen and deuterium measured by “Troitsk nu-mass” group. The results of this work are essential for further investigation of the tritium beta-spectrum in search for active and sterile neutrinos in “Troitsk nu-mass” and KATRIN experiments as well as astrophysical problems. Electrons were generated by the electron gun with a narrow emission spectrum (less than 0.3 eV) at the electron energies of 14, 17, 18.7, 19 and 25 keV. The relative resolution of spectrometer in these measurements was 8.3 × 10–5.