Isoscalar g-factors of odd-odd N = Z nuclei

It is known that the measured and calculated g-factors of 2(1)(+) states in even-even N = Z nuclei have values g congruent to 0.5. Both the collective model and the LS limit of the shell model (with L = 2, S = 0) can explain this. Here we note that the isoscalar g-factors of low-lying 1(+), 3(+), and 5(+) T = 0 states in medium-mass odd-odd N = Z nuclei have also been measured to have values close to 0.5. An up-to-date compilation of the experimental values is presented. Also included are the results of large-scale shell model calculations which agree very well with the experimental data. We show that the isoscalar g-factors in N = Z nuclei also approach 0.5 in the large-l limit for a single-j shell model. Copyright (C) EPLA, 2009