Updated systematics of intermediate-energy single-nucleon removal cross sections

Abstract

The body of experimental measurements of intermediate-energy reactions that remove a single nucleon from a secondary beam of neutron- or proton-rich nuclei continues to grow. These data have been analysed consistently using an approximate, eikonal-model treatment of the reaction dynamics combined with appropriate shell-model descriptions of the projectile initial state, the bound final states spectrum of the reaction residue and single-particle removal strengths computed from their wave-function overlaps. The systematics of the ratio $R_s$ of the measured inclusive cross-section to all bound final states and the calculated cross-section to bound shell-model states -- in different regions of the nuclear chart and involving both very weakly-bound and strongly-bound valence nucleons -- is important in relating the empirically deduced orbital occupancies to those from the best available shell-model predictions. Importantly, several new higher-energy measurements, for which the sudden-approximation aspect of the dynamical description is placed on an even stronger footing, now supplement the previously-analysed measurements. These additional data sets are discussed. Their $R_s$ values are shown to conform to and reinforce the earlier-observed systematics, with no indication that the approximately linear reduction in $R_s$ with increasing nucleon separation energy is a consequence of a breakdown of the sudden approximation.

8 pages, 2 figures

References in corpus (9)

• Momentum sharing in imbalanced Fermi systems
• Systematics of intermediate-energy single-nucleon removal cross sections
• Quenching of single-particle strength from direct reactions with stable and rare-isotope beams
• Mechanisms in knockout reactions
• Is the structure of 42Si understood?
• The structure of 70Fe: Single-particle and collective degrees of freedom
• Shell structure of ${}^{43}$S and collapse of the $N=28$ shell closure
• Elastic breakup cross sections of well-bound nucleons
• The Structure of ${}^{33}$Si and the magicity of the N=20 gap at Z=14

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