Neutron capture cross sections of light neutron-rich nuclei relevant for -process nucleosynthesis
Journal article, 2021
The measurements of neutron capture cross sections of neutron-rich nuclei are challenging but essential for understanding nucleosynthesis and stellar evolution processes in the explosive burning scenario. In the quest of -process abundances, according to the neutrino-driven-wind model, light neutron-rich unstable nuclei may play a significant role as seed nuclei that influence the abundance pattern. Hence, experimental data for neutron capture cross sections of neutron-rich nuclei are needed. Coulomb dissociation of radioactive ion beams at intermediate energy is a powerful indirect method for inferring capture cross section. As a test case for validation of the indirect method, the neutron capture cross section (, ) for was inferred from the Coulomb dissociation of at intermediate energy ( MeV). A comparison between different theoretical approaches and experimental results for the reaction is discussed. We report for the first time experimental reaction cross sections of , , , and . The reaction cross sections were inferred indirectly through Coulomb dissociation of , , and at incident projectile energies around 400-430 MeV using the FRS-LAND setup at GSI, Darmstadt. The neutron capture cross sections were obtained from the photoabsorption cross sections with the aid of the detailed balance theorem. The reaction rates for the neutron-rich Na, Mg, Al nuclei at typical -process temperatures were obtained from the measured () capture cross sections. The measured neutron capture reaction rates of the neutron-rich nuclei, , , and are significantly lower than those predicted by the Hauser-Feshbach decay model. A similar trend was observed earlier for and but in the case of the trend is opposite. The situation is more complicated when the ground state has a multi-particle-hole configuration. For , the measured cross section is about higher than the Hauser-Feshbach prediction.
Author
A. Bhattacharyya
Homi Bhabha National Institute (HBNI)
Saha Institute of Nuclear Physics
U. Datta
Helmholtz Association of German Research Centres
Saha Institute of Nuclear Physics
Homi Bhabha National Institute (HBNI)
A. Rahaman
Saha Institute of Nuclear Physics
Jalpaiguri Government Engineering College
S. Chakraborty
University of Engineering and Management
Saha Institute of Nuclear Physics
T. Aumann
Technische Universität Darmstadt
Helmholtz Association of German Research Centres
S. Beceiro-Novo
Universidade de Santiagode Compostela
K. Boretzky
Helmholtz Association of German Research Centres
C. Caesar
Helmholtz Association of German Research Centres
B. V. Carlson
Instituto Tecnológico de Aeronáutica (ITA)
W. N. Catford
University of Surrey
M. Chartier
University of Liverpool
Saha Institute of Nuclear Physics
D. Cortina-Gil
Universidade de Santiagode Compostela
P. Das
Homi Bhabha National Institute (HBNI)
Saha Institute of Nuclear Physics
G. de Angelis
Laboratori Nazionali di Legnaro
Saha Institute of Nuclear Physics
Paloma Diaz Fernandez
Universidade de Santiagode Compostela
H. Emling
Helmholtz Association of German Research Centres
H. Geissel
Helmholtz Association of German Research Centres
Saha Institute of Nuclear Physics
Justus Liebig University Giessen
D. Gonzalez-Diaz
Helmholtz Association of German Research Centres
M. Heine
Saha Institute of Nuclear Physics
Helmholtz Association of German Research Centres
University of Strasbourg
Håkan T Johansson
Saha Institute of Nuclear Physics
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
Björn Jonson
Saha Institute of Nuclear Physics
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
N. Kalantar-Nayestanaki
University of Groningen
Saha Institute of Nuclear Physics
T. Kröll
Technische Universität Darmstadt
Technical University of Munich
Saha Institute of Nuclear Physics
R. Krucken
Technical University of Munich
Saha Institute of Nuclear Physics
J. Kurcewicz
Helmholtz Association of German Research Centres
C. Langer
Helmholtz Association of German Research Centres
T. Le Bleis
Technical University of Munich
Saha Institute of Nuclear Physics
Y. Leifels
Helmholtz Association of German Research Centres
J. Marganiec
Helmholtz Association of German Research Centres
Saha Institute of Nuclear Physics
G. Munzenberg
Helmholtz Association of German Research Centres
Thomas Nilsson
Saha Institute of Nuclear Physics
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
C. Nociforo
Helmholtz Association of German Research Centres
V. Panin
Helmholtz Association of German Research Centres
S. Paschalis
Saha Institute of Nuclear Physics
University of Liverpool
R. Plag
Helmholtz Association of German Research Centres
R. Reifarth
Helmholtz Association of German Research Centres
M.V. Ricciardi
Helmholtz Association of German Research Centres
C. Rigollet
Saha Institute of Nuclear Physics
University of Groningen
D. Rossi
Helmholtz Association of German Research Centres
Technische Universität Darmstadt
C. Scheidenberger
Justus Liebig University Giessen
Helmholtz Association of German Research Centres
Saha Institute of Nuclear Physics
H. Scheit
Technische Universität Darmstadt
H. Simon
Helmholtz Association of German Research Centres
Y. Togano
Helmholtz Association of German Research Centres
Saha Institute of Nuclear Physics
Rikkyo University
S. Typel
Technische Universität Darmstadt
Helmholtz Association of German Research Centres
Y. Utsuno
Japan Atomic Energy Agency
Saha Institute of Nuclear Physics
A. Wagner
Helmholtz Association of German Research Centres
Homi Bhabha National Institute (HBNI)
F. Wamers
Helmholtz Association of German Research Centres
H. Weick
Helmholtz Association of German Research Centres
J. S. Winfield
Helmholtz Association of German Research Centres
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 104 4 045801Subject Categories (SSIF 2011)
Accelerator Physics and Instrumentation
Subatomic Physics
Atom and Molecular Physics and Optics
DOI
10.1103/PhysRevC.104.045801