“Thermal Spike” model applied to thin targets irradiated with swift heavy ion beams at few MeV/u

Christelle Stodel,Christian Dufour,Bertrand Jacquot,Georges Frémont,Matthieu Michel,Marcel Toulemonde,Christoph Fransen,Emmanuel Clément

doi:10.1051/epjconf/202022905001

Abstract

High electronic excitations in radiation of metallic targets with swift heavy ion beams at the coulomb barrier play a dominant role in the damaging processes of some metals. The inelastic thermal spike model was developed to describe tracks in materials and is applied in this paper to some systems beams/targets employed recently in some nuclear physics experiments. Taking into account the experimental conditions and the approved electron-phonon coupling factors, the results of the calculation enable to interpret the observation of the fast deformation of some targets.

Highlights

In nuclear physics, structural evolution of nuclei when moving away from magic numbers [1] remains intriguing in many aspects
High electronic excitations in radiation of metallic targets with swift heavy ion beams at the coulomb barrier play a dominant role in the damaging processes of some metals
Structural evolution of nuclei when moving away from magic numbers [1] remains intriguing in many aspects

Summary

Introduction

Structural evolution of nuclei when moving (far) away from magic numbers [1] remains intriguing in many aspects. It is not well theoretically reproduced so far by state-of-the-art models. High resolution spectroscopic data reveal this nuclear structure evolution as a function of spin, angular momentum, excitation energy and isospin. Their comparison with advanced nuclear model allow a microscopically description of these evolutions. High resolution gamma-ray spectroscopy sheds light to the nuclear structure by measuring energy of excited states, their decay branching ratios and their lifetime. We discuss target problems in measurements using a so-called plunger device for half-life measurements using the RDDS technique [2] combined with the VAMOS++ spectrometer and the tracking germanium detector array AGATA (Fig. 1)

Results

Discussion

Conclusion