The Emission of Protons from Light Nuclei on Bombardment withα-Particles of Short Range

The expansion chamber method is used to obtain tracks of protons ejected in 67 disintegrations of fluorine and 121 disintegrations of neon while both gases are under $\alpha$-particle bombardment. The energetics of the reaction are in good agreement with the mass data, and protons corresponding to transitions to the ground state of the residual nuclei are found with both elements. No disintegrations are detected until the energies of the $\alpha$-particles reach 3.7 and 4.4 Mev in fluorine and neon, respectively. These are the only energy levels recorded.