| Popis: |
Thin targets of natural argon gas were bombarded with protons with energies between 0.8 and 3.5 MeV. Differential cross sections were measured at three angles for elastic scattering and for the reactions A40(p, p′ γ)A40 and A40(p, α)Cl37. Many anomalies were observed in the elastic scattering cross section, the strongest being at 1.88, 2.45 and 3.4 MeV. Spin and parity j π = 3 2 − and 1 2 + were assigned to the levels corresponding to the first two of these. The anomalies corresponding to the previously reported A40(p, γ)K41 resonances were too small to be detected in this experiment. In the range of incident proton energy between 2.4 and 3.4 MeV, there were about 40 resolved or partly resolved resonances in the yield of α particles. |
