First simultaneous measurement of the γ-ray and neutron emission probabilities in inverse kinematics at a heavy-ion storage ring
Journal article, 2025
The probabilities for γ-ray and particle emission as a function of the excitation energy of a decaying nucleus are valuable observables for constraining the ingredients of the models that describe the deexcitation of nuclei near the particle emission threshold. These models are essential in nuclear astrophysics and applications. In this paper, we have for the first time simultaneously measured the γ-ray and neutron emission probabilities of Pb208. The measurement was performed in inverse kinematics at the Experimental Storage Ring (ESR) of the GSI/FAIR facility, where a Pb208 beam interacted through the Pb208(p,p′) reaction with a hydrogen gas jet target. Instead of detecting the γrays and neutrons emitted by Pb208, we detected the heavy beamlike residues produced after γand neutron emission. These heavy residues were fully separated by a dipole magnet of the ESR and were detected with outstanding efficiencies. The comparison of the measured probabilities with model calculations has allowed us to test and select different descriptions of the γ-ray strength function and the nuclear level density available in the literature.
Author
Michele Sguazzin
University of Bordeaux
Beatriz Jurado
University of Bordeaux
Jérôme Pibernat
University of Bordeaux
Jacobus Andreas Swartz
University of Bordeaux
Manfred Grieser
Max Planck Society
Jan Glorius
Helmholtz Association of German Research Centres
Yuri Litvinov
Helmholtz Association of German Research Centres
Camille Berthelot
University of Bordeaux
Bogusław Włoch
University of Bordeaux
Jörn Adamczewski-Musch
Helmholtz Association of German Research Centres
P. Alfaurt
University of Bordeaux
Pauline Ascher
University of Bordeaux
Laurent Audouin
University Paris-Saclay
Bertram Blank
University of Bordeaux
Klaus Blaum
Max Planck Society
Benjamin Brückner
Goethe University Frankfurt
Sophia Florence Dellmann
Goethe University Frankfurt
Iris Dillmann
University of Victoria
TRIUMF
César Domingo-Pardo
Universitat de Valencia
Marc Dupuis
The French Alternative Energies and Atomic Energy Commission (CEA)
University Paris-Saclay
Philipp Erbacher
Goethe University Frankfurt
Mathieu Flayol
University of Bordeaux
Oliver Forstner
Helmholtz Association of German Research Centres
David Freire-Fernández
Heidelberg University
Max Planck Society
Mathias Gerbaux
University of Bordeaux
Jerome Giovinazzo
University of Bordeaux
Stéphane Grévy
University of Bordeaux
Christopher Griffin
TRIUMF
Alexandre Gumberidze
Helmholtz Association of German Research Centres
Sebastian Heil
Goethe University Frankfurt
Andreas Heinz
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
Regina Hess
Helmholtz Association of German Research Centres
Deniz Kurtulgil
Goethe University Frankfurt
Nikolaus Kurz
Helmholtz Association of German Research Centres
Guy Leckenby
TRIUMF
University of British Columbia (UBC)
Sergey Litvinov
Helmholtz Association of German Research Centres
Bernd Lorentz
Helmholtz Association of German Research Centres
Vincent Méot
University Paris-Saclay
The French Alternative Energies and Atomic Energy Commission (CEA)
Julien Michaud
University of Bordeaux
IPN Orsay
S. Pérard
University of Bordeaux
Nikolaos Petridis
Helmholtz Association of German Research Centres
Ulrich Popp
Helmholtz Association of German Research Centres
Diego Ramos
Grand Accélérateur National d'Ions Lourds (GANIL)
René Reifarth
Los Alamos National Laboratory
Goethe University Frankfurt
Mathieu Roche
University of Bordeaux
Shahab Sanjari
Aachen University of Applied Sciences
Helmholtz Association of German Research Centres
Ragandeep Singh Sidhu
University of Edinburgh
Max Planck Society
Helmholtz Association of German Research Centres
Uwe Spillmann
Helmholtz Association of German Research Centres
Markus Steck
Helmholtz Association of German Research Centres
Th Stöhlker
Helmholtz Association of German Research Centres
Benedikt Thomas
University of Bordeaux
Loïc Thulliez
University Paris-Saclay
Maud Versteegen
University of Bordeaux
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 111 2 024614Creation of heavy elements in neutron-star mergers
Knut and Alice Wallenberg Foundation (2020.0076), 2021-01-01 -- 2025-12-31.
Subject Categories (SSIF 2025)
Subatomic Physics
DOI
10.1103/PhysRevC.111.024614