Capture of Protons inK39

Abstract

Evaporated natural potassium metal targets were bombarded with protons from a Cockcroft-Walton generator. The excitation function was studied from 0.5 to 1.15 Mev. The gamma rays from a level found in calcium 40 at 9.29 Mev above the ground state were studied with single-crystal spectrometers and with a pair spectrometer. Gamma rays of energy 9.29±0.005 Mev, 5.93±0.005 Mev, 5.55±0.005 Mev, 3.73±0.005 Mev, and 0.500±0.005 Mev were found and suggest a decay scheme in agreement with the levels in ${\mathrm{Ca}}^{40}$ found by Braams by inelastic proton scattering.