Study of medium-mass and heavy hypernuclei produced through spallation and fission reactions in inverse kinematics

TL;DR

This paper explores the production of hypernuclei via spallation and fission reactions in inverse kinematics, utilizing advanced models to understand formation processes and hypernuclei dynamics at relativistic energies.

Contribution

It introduces a coupled modeling approach for hypernuclei production in spallation reactions, extending existing models to include strange particles and hyperfission dynamics.

Findings

Successful modeling of hypernuclei formation near drip lines

Constraints on viscosity parameters in hyperfission reactions

Enhanced understanding of hypernuclei production mechanisms

Abstract

Innovative experiments using the inverse kinematics technique to accelerate light, medium-mass, and heavy nuclei at relativistic energies have become excellent tools to produce and study hypernuclei. In this work, we investigate hypernuclei created in spallation reactions, where multifragmentation, particle evaporation, and fission processes play an important role in the formation of final hypernuclei residues. For the description of spallation reactions, we couple the Li\`ege intranuclear cascade model, extended recently to the strange sector, to a new version of the ablation (ABLA) model that accounts for the evaporation of {\Lambda}-particles from hot hyperremnants produced during the intranuclear cascade stage. These state-of-the art models are then used to study the production of hypernuclei close to the drip lines through spallation-evaporation and fission reactions. Moreover, recent results obtained for the study of hypernuclei dynamics, in particular, for the constraint of the viscosity parameter involved in hyperfission reactions are also presented.