Abstract
Different, complementary, techniques are used to experimentally probe clustering aspects in several carbon isotopes: \(^{11,12,13,16}\)C. Our approaches involve breakup reactions with radioactive cocktail beams (\(^{16}\)C), compound nucleus reactions and resonant scattering at low energies (\(^{11,13}\)C), and direct reactions with the detection of in-flight resonance decay fragments (\(^{12}\)C). In this paper, we discuss results of our experimental campaign: in \(^{11}\)C, we unveil the existence of a new excited state, characterized by clustering nature, at an excitation energy of 9.36 MeV (\(5/2^-\)); the decay path of the Hoyle state in \(^{12}\)C (7.654 MeV, \(0^+\)) is investigated with unprecedented precision; we refine the spectroscopy of \(^{13}\)C above the \(\alpha \)-threshold supporting the possible appearance of the \(K^\pi ={3/2}^\pm \) molecular bands, based on the \(\alpha + ^{9}\)Be structure, previously discussed in the literature; in \(^{16}\)C, we find evidence for \(^{6}\)He–\(^{10}\)Be decays. Our findings have an impact on the understanding of clustering phenomena in light nuclear systems.
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Acknowledgements
I want also to acknowledge the staff of the tandem accelerator of Naples, the tandem accelerator of INFN-LNS and the K-800 cyclotron of INFN-LNS (FRIBs facility) for having delivered high-quality beams. I am indebted to Dr. Miguel Marques (LPC Caen) for useful discussions and for his careful review of the contents discussed in the paper.
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Dell’Aquila, D. Experimental studies of clustering in light nuclei: 11,12,13,16C. Eur. Phys. J. Plus 135, 165 (2020). https://doi.org/10.1140/epjp/s13360-020-00155-8
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DOI: https://doi.org/10.1140/epjp/s13360-020-00155-8