Abstract
Due to their high selectivity, transfer and sequential decay reactions are powerful tools for studies of both single particle (nucleon) and cluster states in light nuclei. Their use is particularly simple for investigations of α -particle clustering (because α -particle has J π =0 + , which simplifies spin and parity assignments to observed cluster states), but they are also easily applicable to other types of clustering. Recent results on clustering in neutron-rich isotopes of beryllium, boron and carbon obtained measuring the 10 B+ 10 B reactions (at 50 and 72 MeV) are presented. The highly efficient and segmented detector systems used, built from 4 Double Sided Silicon Strip Detectors (DSSSD) allowed detection of double and multiple coincidences and, in that way, studies of states populated in transfer reactions, as well as their sequential decay.
Highlights
Due to their high selectivity, transfer and sequential decay reactions are powerful tools for studies of both single particle and cluster states in light nuclei
Isotopes of light nuclei having additional neutrons show a different type of clustering, with extra neutrons acting as valence particles in molecule-like structures
The best example of such clustering is found among states of beryllium isotopes 9−12Be [4, 5] - neutrons fill different “molecular orbits” around the existing two-centre (α α) structure and corresponding states have been identified [7]
Summary
Due to their high selectivity, transfer and sequential decay reactions are powerful tools for studies of both single particle (nucleon) and cluster states in light nuclei. Isotopes of light nuclei having additional neutrons (compared to the N =Z ones) show a different type of clustering, with extra neutrons acting as valence particles in molecule-like structures.
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