Towards the fission-fusion reaction mechanism

Laura Desiree Geulig; Erin Grace Fitzpatrick; Maximilian Weiser; Veronika Kratzer; Vitus Magin; Masoud Afshari; Florian H. Lindner; Jörg Schreiber; Peter G. Thirolf

doi:10.1117/12.2665682

8 June 2023 Towards the fission-fusion reaction mechanism

Laura Desiree Geulig, Erin Grace Fitzpatrick, Maximilian Weiser, Veronika Kratzer, Vitus Magin, Masoud Afshari, Florian H. Lindner, Jörg Schreiber, Peter G. Thirolf

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Proceedings Volume PC12583, Applying Laser-driven Particle Acceleration III: Using Distinctive Energetic Particle and Photon Sources; PC125830B (2023) https://doi.org/10.1117/12.2665682
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

The proposed ‘fission-fusion’ reaction mechanism aims at investigating the rapid neutron-capture process, contributing to the formation of heavy elements, by using laser-accelerated thorium ions in a sandwich target configuration [1]. In a first step, the efficient acceleration of gold ions is investigated, as recently achieved in our measurement at the PHELIX laser with 500 fs long pulses [2]. In this experiment, for the first time, the laser-based acceleration of gold ions above 7 MeV/u was demonstrated. Additionally, individual gold charge states were resolved with unprecedent resolution. This allowed to investigate the role of collisional ionization using a developmental branch of the particle-in-cell simulation code EPOCH [3], showing a much better agreement of the simulated charge state distributions with the experimentally measured ones than when only considering field ionization. This work is continued at the Centre for Advanced Laser Applications (CALA), using the ATLAS 3000 laser (800 nm central wavelength, 25 fs pulse length). [1] D. Habs et al., Appl. Phys. B 103, 471-484 (2011) [2] F.H. Lindner et al., Sci. Rep. 12, 4784 (2022) [3] M. Afshari et al., Sci. Rep. 12, 18260 (2022)

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Laura Desiree Geulig, Erin Grace Fitzpatrick, Maximilian Weiser, Veronika Kratzer, Vitus Magin, Masoud Afshari, Florian H. Lindner, Jörg Schreiber, and Peter G. Thirolf "Towards the fission-fusion reaction mechanism", Proc. SPIE PC12583, Applying Laser-driven Particle Acceleration III: Using Distinctive Energetic Particle and Photon Sources, PC125830B (8 June 2023); https://doi.org/10.1117/12.2665682

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KEYWORDS

Gold

Ions

Spectroscopy

Infrared spectroscopy

Ionization

Laser applications

Pulsed laser operation

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