[en] Nuclear spectroscopy studies of ¹³³₅₁Sb₈₂ have been performed at the recoil fission product separators JOSEF and LOHENGRIN. A tentative level scheme has been established for this nucleus with one proton in addition to the doubly closed shell core ¹³²Sn. Two isomeric states with half-lives of 3 and 16 μs have been found at excitation energies of > 4,300 keV and 4,526 keV, respectively. Lower limits of 15/2 are deduced for the spins of these levels. The hsub(11/2) proton state is suggested at 2,792 keV in agreement with the systematics of the lighter Z = 51 isotopes and the heavier N = 82 isotones. Several states have been observed between 4,300 and 4,600 keV which are probably due to the coupling of the single proton to core-excited states which have energies between 4,000 and 4,800 keV. (orig.)