ABSTRACT
There is considerable conflict of opinion as to the structure of the diplon and the mass of the neutron. In order to throw further light on these questions, the authors made experiments to test whether neutrons are liberated when diplogen is bombarded by fast alpha-particles. Since the ionization potential of the heavy isotope of hydrogen should be almost identical with that of ordinary hydrogen, the ionization produced by the alpha-particles, and consequently the stopping power for the alpha-particles, should be the same in the two gases. The presence of neutrons was examined by counting the number of 'kicks' produced in the oscillograph, using photographic recording. The increased number of diplons for each absorption is to be expected that the increased range of travel of the diplons, if the field of force gives rise to the scattering. It can be concluded that the field of force surrounding the diplogen nucleus must be sensibly the same as for the hydrogen nucleus.
