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High-spin states have been investigated in the mirror pair nuclei 49Cr (Z = 24, N = 25) and 49Mn (Z = 25, N = 24).Mirror symmetry up to the band termination at about 10.7 MeV has been established. A comparison of the corresponding energy levels of the pair shows, for the first time, that the Coulomb energy difference approaches zero as the band termination is approached. This is explained intuitively in terms of a pure f7/2 shell framework. For 49Cr, excellent agreement is found between the data and recent full pf-shell calculations. © 1997 The American Physical Society.

Original publication




Journal article


Physical review letters

Publication Date





4349 - 4352