The yield mtio of the high-spin state of 122m Sb (fr) and the low-spin state of 122g Sb (2- ) formed via the 123 Sbh, n/22m,g Sb reaction has been measured as a function of the bremsstmhlung end-point energy in the mnge of 40-MeV to 60-MeV. Use was made of the activation technique in combination with high-resolution , gamma-mg spectrometry. The isomeric yield mtios for the 123 Sbh,n/22m,g Sb reaction measured at 40-, 45-, 50-, 55-, and 60-MeV bremsstmhlung are 0.941 + or - 0.022, 0.362 + or - 0.020, 0.374 + or - 0.021, 0.371 + or - 0.021, and 0.367 + or - 0.022. According to knowledge, the present results are the first measurement.