RESONANCES AND DECAY MODES OF AL-27+P FOR EP = 3.58-4.06 MEV

Many resonances in the reaction Al-27 + p for E(p) = 3.58-4.06 MeV were observed corresponding to excitation energies E(x) = 15.03-15.50 MeV of the compound system Si-28. We measured the excitation functions for the decay mode with exit channelS (p0-p4,alpha-0,alpha-1,gamma) in the above proton energy range with energy steps of 2 keV at 135-degrees and 145-degrees for proton and a particles and at 60-degrees for gamma rays. Two solid-state detectors and a 5.1 cm X 5.1 cm NaI(Tl) scintillator were employed. High experimental resolution of approximately 1 keV enables us to deduce the average Si-28 level spacing in the region of 15 MeV excitation. The structure of resonances is discussed and energies, together with widths of resonances, are presented. The J-pi assignment for several resonances was proposed as well.