γ decay of states in 47Cr

States in 47Cr were studied using the 46Ti(3He,2n) 47Cr reaction with 22-MeV 3He ions and the 40Ca(12C,αn) 47Cr reaction with 38-MeV 12C ions. Prompt and delayed γ-γ coincidence studies were performed. The following decay scheme was established (energies in keV): (15/2)-/sub 1322.3//sup arrow-right/ (11/2)-/sub 1158.3//sup arrow-right/ (7/2)-/sub 75.4//sup arrow-right/ (5/2)-/sub 99.3//sup arrow-right/ (3/2)-(g.s.). In addition, the (3/2)+ state was determined to have an excitation energy of 471.5 keV and was found to decay to the (5/2)- state. Since 47Cr has T/sub z/ = (1/2) and is the mirror of the well-known 47V nucleus, Coulomb displacement energies were deduced. The variation of Coulomb displacement energy with mass number is discussed for f/sub 7/2/ shell nuclei. In addition, we used the measured energies for the first (3/2)+ states in T = (1/2) mirror pairs of f/sub 7/2/ shell nuclei to determine the average Coulomb interaction energy between a d/sub 3/2/ hole and an f/sub 7/2/ particle, and found an increase in magnitude with increasing mass number