Mirror symmetry at high spin in 51 Fe and 51 Mn
2000
Gamma decays from excited states in the T{sub z}=-1/2 nucleus {sup 51}Fe have been observed for the first time. The differences in excitation energies as compared with those of the mirror partner, {sup 51}Mn, have been interpreted in terms of Coulomb effects and the resulting Coulomb energy differences (CED) can be understood intuitively in terms of particle-alignment effects. A new CED effect has been observed, in which different CED trends have been measured for each signature of the rotational structures that characterize these mid-f{sub 7/2} shell nuclei. Large-scale fp-shell model calculations have been used to compute the trends of the CED as a function of spin. The result of comparing these calculations with the data demonstrates an ability to reproduce the fine details of the Coulomb effects with a precision far greater than has been previously achieved.
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