A parameter-free microscopic folding calculation of proton scattering supports neutron dominance in the 2+1 states of 12Be and 16C and shows that the standard Bernstein analysis can underestimate the neutron transition matrix element by about 15%.
Borromean Feshbach resonance in 11Li studied via 11Li(p,p')
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abstract
A dipole resonance of 11Li is newly found by a 9Li + n + n three-body model analysis with the complex-scaling method. The resonance can be interpreted as a bound state in the 10Li + n system, that is, a Feshbach resonance in the 9Li + n + n system. As a characteristic feature of the Feshbach resonance of 11Li, the 10Li + n threshold is open above the 9Li + n + n one, which reflects a distinctive property of the Borromean system. A microscopic four-body reaction calculation for the 11Li(p,p') reaction at 6 MeV/nucleon is performed by taking into account the resonance and nonresonant continuum states of the three-body system. The angular distribution of the elastic and inelastic scattering as well as the breakup energy spectrum recently observed are reproduced well.
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Microscopic calculation of inelastic proton scattering off $^{18}$O, $^{10}$Be, $^{12}$Be, and $^{16}$C for study of neutron excitation in neutron-rich nuclei
A parameter-free microscopic folding calculation of proton scattering supports neutron dominance in the 2+1 states of 12Be and 16C and shows that the standard Bernstein analysis can underestimate the neutron transition matrix element by about 15%.