ABSTRACT
This chapter discusses the nucleus theory of atomic structure, it is anticipated that the nuclei of light atoms should set in swift motion by intimate collisions with α particles. In most of the experiments of Marsden, a thin glass α ray tube, containing purified radium emanation, was used as an intense source of rays. Marsden had observed that the number of H scintillations from a nickel plate, coated with radium C, was considerably greater than for a corresponding quantity of emanation-measured by γ rays from α-ray tube. The whole process of filling and removal for testing was done as rapidly as possible, and the counting of scintillations was usually begun within four minutes after filling. In addition, both nitrogen and oxygen atoms are set in such swift motion by collision with α particles that they cause scintillations outside the range of the α particles.
