An asymmetric fission island driven by shell effects in light fragments

by Roman Gernhaeuser (TUM), Tobias Jenegger (Technische Universität München)

Wednesday 11 Jun 2025, 11:00 → 12:00 Europe/Berlin

5101.EG.024 (Seminar Room)

Zoom Room:

https://cern.zoom.us/j/62412236769?pwd=Dl6UCAc4008Wtx9LDBTSSOrj99FJlA.1
Meeting ID: 624 1223 6769
Passcode: 294336

Abstract:

Nuclear fission leads to the splitting of a nucleus into two fragments.
Studying the mass and charge distributions of these fragments is
essential for understanding fission mechanisms and refining theoretical
models. The S455 experimental campaign in 2021 with the advanced R3B
setup at GSI led to the discovery of a new island of asymmetric fission
in neutron-deficient isotopes near mercury (Z = 80), driven by shell
effects in the light fragments. This finding advances our understanding
of element formation in both stellar environments and nuclear reactors.
In this talk, we will present the results of this analysis—recently
published in Nature[1]—and outline the upcoming follow-up experiments at
FAIR, which employ unique experimental approaches to explore the new
region of asymmetric fission in greater detail and probe fundamental
aspects of nuclear matter under extreme conditions.
[1]https://www.nature.com/articles/s41586-025-08882-7

FAIR Video

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