Particle identification for neutron rich nuclei ⁶³,⁶⁵Cr from knockout reactions

This paper presents the identification for 63,65Cr isotopes as the products of knockoutreactions for the first time, measured at RIKEN, Japan, within the framework of the “Shell Evolution And Search for Two-plus energies At RIBF” (RIBF- Radioactive Isotope Beam Factory) project, in short SEASTAR. Based on the Bρ-ΔE-ToF method, these nuclei were well separated. The results will be used in the spectroscopic study on 63,65Cr contributing data to the structural study around the N=40 “island of inversion”.

Breakup reactions and their ambiguities

We review the ambiguities in the nuclear information extracted from breakup reactions, focusing on those originating from the description of the reaction mechanism and the overall ambiguity inherent to their interpretation in terms of shell occupancies. We present the current discussion about nucleon knockout reactions and how the understanding of the reaction mechanism would help reducing uncertainties. For the former, we consider the case of $$^{11}$$ 11 Li, due to the existing large data set. For the latter, we recall the paradigmatic example of the electro-dissociation of the deuteron to address the question of the scale and scheme dependence from the theoretical framework used for the interpretation.