Complete kinematics study of the p + 11B → 12C reaction

3rd International Workshop on "State of the Art in Nuclear Cluster Physics"

Laursen, K.L.^1 ; Fynbo, H.O.U.^1 ; Howard, A.M.^1 ; Kirsebom, O.S.^1

Department of Physics and Astronomy, Aarhus University, Aarhus C

8000, Denmark^1

关键词: A-particles;    Gamma transition;    Indirect detection;    Proton energy;    Resonance spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/569/1/012073/pdf
DOI  :  10.1088/1742-6596/569/1/012073

来源: IOP

【 摘 要 】

New data and preliminary results from an experimental study of the p +11B reaction are presented. Using proton energies in the range of 167-170 keV the 2+ resonance in12C at an excitation energy of 16.11 MeV was populated. Detecting the emitted a-particles in full kinematics allows us to study12C resonances and their properties. In addition to the 3-α break-up of the 16.11 MeV resonance we observe γ-transitions to lower lying resonances. Transitions to the 3-state at 9.64MeV, the 1-state at 10.84 MeV and the 1+state at 12.71 MeV are clearly seen. The transitions to the 1-state has not been observed previously. In addition we see decays to structures of natural parity at excitation energies around 11-13 MeV. The results illustrate that the indirect detection of γ-decays is an effective technique for studying the low lying resonance spectrum of12C.