THE STUDY OF SOME NON-SOLATED RESONANCES FOR THE ~(23)Na (p,α)~(20)Ne REACTION

The excitation functions of the ~(23)Na(p,α_0)~(20)Ne_(g·s).and the ~(23)Na(p,α_1)~(20)Ne_(?) reae-tion have been measured from E_p=1 to 2.5 MeV at θ_L=30°,150° and 30°,respectively.Around the resonance at 2.171 MeV,the excitation functions of the(p,α_0)reactionhave been measured at 12 angles,then,some angular distributions have been obtainedfrom these excitation functions.In addition,the angular distribution of the(p,α_0)reaction for the resonance at 2.171 MeV has also been measured directly at energy ofthe resonance peak of the excitation function at 150°.For the resonance at 2.117MeV,the angular distribution have been measured at two energies,one at the energyof the resonance peak of the excitation function at 150°,another at the energy of thehalf maximum point of the resonance peak on the higher energy side.Around the re-sonance at 2.075 MeV,the excitation functions have been measured at 16 angles,andthe angular distribution has been obtained from three excitation functions.The an-gular distributions of the three resonances are not symmetric about 90°,and the posi-tions of the resonance peaks of these resonances varies with the angle of measurement.By means of the compound nucleus theory,discussions have been made for these non-solated resonances.