Low-lying states of 121Sb studied in the 123Sb(p,t) reaction -: art. no. 054312

Angular distributions of tritons from the Sb-123(p,t)Sb-121 reaction induced by 26 MeV protons have been measured up to an excitation enegy of about 3 MeV using a Q3D spectrometer. Many previously unknown levels of Sb-121 have been observed. Microscopic calculations of the Sb-123(p,t)Sb-121 reaction cross sections, using the quasiparticle-phonon model, give a reasonably good description of the fragmentation of the (p.t) cross sections and the lack of (p,t) strength above 2.7 MeV of excitation energy. The experimental results from the Sn-122(p,t)Sn-120 reaction have been used to discuss the role of the unpaired quasiparticle in Sb-121 in determining the properties of its levels.