2018 CAP Congress / Congrès de l'ACP 2018

Ab initio calculations for exotic nuclei (I)

13 Jun 2018, 13:30

30m

SUB 224 (cap. 50) (Dalhousie University)

Invited Speaker / Conférencier(ère) invité(e) Nuclear Physics / Physique nucléaire (DNP-DPN) W3-8 Nuclear Structure II (DNP) | Structure nucléaire II (DPN)

Speaker

Matteo Vorabbi (TRIUMF Canada's particle accelerator centre)

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 $abinitio$ 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 the exotic structure of the ${}^9$He nucleus will be presented. The properties of this system were investigated by analyzing the $n{+}^8$He continuum and using chiral interactions as the only input. Our analysis produced an unbound ${}^9$He nucleus with two resonant states found above the $n{+}^8$He breakup threshold. In particular, no positive parity ground state was found, indicating the break-up of the parity-inversion mechanism found in the ${}^{11}$Be and ${}^{10}$Li nuclei of the same $N=7$ isotonic chain. Finally, recent calculations for elastic proton-nucleus scattering will be presented too. The differential cross section and the analyzing power for several light target nuclei were computed using a microscopic optical potential constructed from new $abinitio$ nonlocal densities obtained within the NCSM framework.

Presentation materials

Vorabbi_CAP2018_Halifax.pdf