Study of highly excited states in 16O with 3He+13C reactions at low energies
16TH VARENNA CONFERENCE ON NUCLEAR REACTION MECHANISMS, NRM 2023(2024)
摘要
We report some preliminary experimental results on C-13(He-3,alpha)C-12 reactions at low bombarding energies, in the range 1.4 - 2.2 MeV. The reconstruction of kinematic quantities in the final channel was performed by using a high-performance, low-threshold hodoscope, allowing for the particle identification even for low energy ejectiles. We succeeded in measuring detailed angular distributions, in absolute values, even for the transition leading to the emission of C-12 in the Hoyle state, then resulting into 4 alpha particles in the final channel. The analysis of angular distributions as a function of energy suggests the occurrence of two low-spin resonant states, respectively with J(pi) = 1(-) and 2(+), at excitation energies of approximate to 24.1 and 24.5 MeV.
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