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Abstract
Projectile break-up reactions induced on polyethylene (CH_2) target are used in order to study the spectroscopy of ^10Be and ^16C nuclei. For the present experiment we used ^10Be and ^16C beams delivered by the FRIBs facility at INFN-LNS, and the CHIMERA 4pi multi-detector. ^10Be and ^16C structures are studied via a relative energy analysis of break-up fragments. The ^4He+^6He break-up channel allowed us to study the spectroscopy of ^10Be; in particular we find evidence of a new state in ^10Be at 13.5 MeV excitation energy. The ^16C nucleus is studied via ^6He-^10Be correlation; we find the fingerprint of a possiblestate at about 20.6 MeV
Highlights
The investigation of cluster structures in neutron-rich nuclei is an important tool to explore the behaviour of nuclear forces in few body interacting systems [1]
In the present paper we report new results on the spectroscopy of 10Be and 16C excited states above the cluster emission thresholds, investigated via sequential projectile break-up reactions
The experiment was performed at the FRIBs facility of the INFN-Laboratori Nazionali del Sud (LNS)
Summary
The investigation of cluster structures in neutron-rich nuclei is an important tool to explore the behaviour of nuclear forces in few body interacting systems [1]. These neutrons can assume the role of covalent particles acting as a glue-like between the α cluster centers and leading to the so called nuclear molecules [1] In this complex scenario, beryllium and carbon neutron-rich isotopes assume a very important role thanks to their possible, respectively, dymeric and trimeric molecular structures [1]. An interesting neutron-rich beryllium isotope is the 10Be, for which the spectroscopy is still not fully understood This nucleus is characterized by a deformed ground state [2] on which a positive parity rotational band is built. The spectroscopy of 16C is extremely poorly known and an experimental evidence of these states is still missing For this reason, 16C has recently attracted a large interest [9, 10], but very few data have been reported and no definitive conclusions can be drawn. For the 16C nucleus, the 6He+10Be correlations suggest the presence of a new state at about 20.6 MeV
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