| Popis: |
Summary The excitation-functions of a singuletline and a tripletline of the Hydrogenmolecule have been measured. In the experimental method a narrow beam of electrons and a F a r a d a y-cage are used. The electrons are accelerated by a grid at high potential, placed at a short distance from the cathode. This grid is followed by another grid that is at a potential only a little above that of the cathode Almost all ions, formed by the electrons of the beam before its entrance into the cage are captured by this last grid. The optical conditions are such, that the intensities emitted in a horizontal section through the beam are superponed, whereas in a vertical plane a sharp image of the beam is formed. The measured intensities are corrected for: o a) The decrease of intensity along the beam. b) Slight differences in pressure and temperature of the gas. c) It is possible to determine the probability of dessociation of the gas by comparison of the intensities of the molecular lines emitted by the gas under various pressures. The intensities are corrected for the differences in concentration of the molecules, caused by differences in this probability at various velocities of the electrons. |
