Author:
Lombardo Ivano,Dell’Aquila Daniele,Vigilante Mariano,Aytekin Mualla,Redigolo Luigi,Baldesi Lucia,Barlini Sandro,Camaiani Alberto,Casini Giovanni,Ciampi Caterina,Cicerchia Magda,Fabris Daniela,Frosin Catalin,Gramegna Fabiana,Marchi Tommaso,Ordine Antonio,Ottanelli Pietro,Pasquali Gabriele,Piantelli Silvia,Russo Marco,Stefanini Andrea,Valdre Simone,Verde Giuseppe
Abstract
We report some preliminary experimental results on 13C(3He,α)12C 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 12C in the Hoyle state, then resulting into 4 α 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 Jπ = 1− and 2+, at excitation energies of ≈ 24.1 and 24.5 MeV.