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    • Dunford, R. W.; Liu, C. J.; Last, J.; Berrahmansour, N.; Vondrasek, R.; Church, David A.; Curtis, L. J. (American Physical Society, 1991)
      We report a clear demonstration of the effect of hyperfine quenching of a forbidden transition by direct comparison of the lifetimes of the 2 3P0 level in the heliumlike isotopes Ni-61(26+) and Ni-58(26+). We find the ...