Energy Levels inC12,Al27, andNa23Using a Scintillation Spectrometer for Heavy Particles

Energy levels in carbon, aluminum, and sodium have been measured using a "proportional" sodium iodide scintillation counter to determine energies of outgoing protons from inelastic proton scattering at 7.26 Mev with the following results: ${\mathrm{C}}^{12}$: 4.45 Mev; ${\mathrm{Al}}^{27}$: 0.84, 1.01, 2.23, 2.77, 3.03, 3.71, 4.00, 4.47, 4.60, 4.87, 5.43 Mev; ${\mathrm{Na}}^{23}$: 2.10, 2.37, 2.69, 3.01, 3.70, 3.92, 4.45 Mev.