Abstract
The yield of the deexcitation gamma ray following inelastic proton scattering to the first excited states of 46Ti, 48Ti, 50Cr, 54Fe, and 56Fe has been studied for proton energies between 2.5 and 3 MeV with energy resolution of approximately 1700 eV. For all targets except 54Fe, angular distributions of the gamma-ray yield have been measured as a means of assigning spins and parities to resonances observed in the excitation functions. A total of approximately 160 resonances have been observed and assigned in this way. This work has shown the first excited state of 50Cr to have spin 2. In addition, the spacings of 5 2 + levels in the compound nuclei 47V, 51Mn, and 57Co are consistent with the dependences on neutron excess and shell structure observed in neutron total cross section measurements. There are also indications in the data of a maximum in the D-wave proton strength function in the neighborhood of mass number 47.
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