The 22Ne(α, n)25Mg reaction was studied at bombarding energies 1.9 to 4.7 MeV, using pulsed beam time-of-flight spectroscopy. Angular distributions of the neutrons were taken at energy intervals of 60-100 keV. Simultaneously the gamma yield from the excited states in 25Mg was detected. The cross sections for the various final states in 25Mg, as well as the total cross section for the reaction, were obtained. The reaction is shown to proceed mainly through resonances in the compound system. Twelve resonances are identified, of which seven are also assigned spins and parities. The reaction is shown to be a possible major neutron source for the sprocess in massive stars.
- Nuclear reactions