Speaker
Dr
Matteo Vorabbi
(TRIUMF)
Description
One of the recently developed approaches capable of describing both bound and scattering states in light nuclei simultaneously is the No-Core Shell Model with Continuum (NCSMC).
This technique represents a state-of-the-art *ab initio* approach and combines the No-Core Shell Model (NCSM) description of short-range correlations with the clustering
and scattering properties of the Resonating Group Method. Recent NCSMC calculations of $^7$Be and $^7$Li will be presented. The properties of these nuclei were investigated
by analyzing the continuum of all the binary mass partitions involved in the creation of these systems, using chiral interactions as the only input.
Our calculations reproduce all the experimentally known states in the correct order and predict new possible resonances with negative and positive parity. A positive-parity $S$ wave resonance is found analyzing the continuum of p + $^6$He at a very low energy above the threshold, which produces a very pronounced peak in the astrophysical $S$ factor of
the $^6$He(p,$\gamma$) $^7$Li radiative capture. Possible implications for astrophysics have still to be investigated.
Primary author
Dr
Matteo Vorabbi
(TRIUMF)
