High-energy proton spectra in the energy range E_p^c.m∼8.5–25 MeV are measured in the reaction ¹²C+⁹³Nb at E_lab(¹²C)=42.5 MeV and at laboratory angles of 130^°, 145^°and 160^°. The spectra,recorded in coincidence with a gamma ray multiplicity detector array, show a broad structure which becomes more prominent at higher multiplicity. The centroid of the structure shifts with multiplicity.These features could arise from an unusual spin and excitation energy dependence of the nuclear level density in Pd and Ag nuclei with mass around A=104. However, a non-statistical process,viz.,the massive cluster transfer, cannot be ruled out.