LOW-LYING ENERGY LEVELS IN Cl-35

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Abstract
The reaction Cl35(p,p′γ)Cl35 has been observed by the gamma radiation arising from the first two excited levels of chlorine-35. Excitation functions for these radiations were measured for a range of proton energies from 2.3 to 3.25 Mev. Many sharp resonances are observed, of which a dozen are prominent. Angular distributions of the gamma rays from the 1.22-Mev and the 1.76-Mev excited levels of Cl35 have been measured over six resonances. The distribution functions, together with additional measurements by other investigators, yield spin assignments of 1/2 and 5/2 for the levels at 1.22 and 1.76 Mev respectively.