Abstract
In order to investigate the existence of molecular and/or exotic cluster configurations in Boron and Carbon n-rich isotopes we undertook two experiments: the first experimental study of exotic 9Li+α cluster states in 13B using the resonance scattering method at TRIUMF (Canada), and, with the same technique, the measurement of 10Be+α scattering at LNS in Catania, where a 10Be radioactive beam was produced for the first time. In order to measure the excitation function in a wide energy range, the beams were stopped in a Helium-flooded chamber. In the case of 13B, the elastic excitation function shows the presence of various peaks in an excitation energy region never explored before. In the case of 14C, our exclusive measurement of elastic scattering data with a high intensity beam, sheds some light on the contradictory previously published results [1, 2].
Highlights
Some of the properties of nuclei can be described by assuming a nuclear structure made of a few weakly interacting clusters
In light unstable nuclei different types of clusters may exist: clusters which are not ordinary stable particles, but unstable, deformed and easy to break-up particles. The presence of these types of clusters is expected to become more and more favored when nuclei approach the drip-line [3]. Structures made of such exotic clusters are predicted to exist in some of the excited states of Beryllium and Boron n-rich isotopes
A microchannel plate (MCP) detector was placed under vacuum, just upstream the entrance window, in order to give a signal whenever a 9Li beam particle entered into the chamber
Summary
Some of the properties of nuclei can be described by assuming a nuclear structure made of a few weakly interacting clusters. In light unstable nuclei different types of clusters may exist: clusters which are not ordinary stable particles (like the αs), but unstable, deformed and easy to break-up particles. The presence of these types of clusters is expected to become more and more favored when nuclei approach the drip-line [3]. Structures made of such exotic clusters are predicted to exist in some of the excited states of Beryllium and Boron n-rich isotopes.
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