Neutron capture cross sections of light neutron-rich nuclei relevant for -process nucleosynthesis
Artikel i vetenskaplig tidskrift, 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.

Författare

A. Bhattacharyya

Homi Bhabha National Institute (HBNI)

Saha Institute of Nuclear Physics

U. Datta

Helmholtz

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

S. Beceiro-Novo

Universidade de Santiagode Compostela

K. Boretzky

Helmholtz

C. Caesar

Helmholtz

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

H. Geissel

Helmholtz

Saha Institute of Nuclear Physics

Justus-Liebig-Universität Gießen

D. Gonzalez-Diaz

Helmholtz

M. Heine

Saha Institute of Nuclear Physics

Helmholtz

Université de Strasbourg

Håkan T Johansson

Saha Institute of Nuclear Physics

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Björn Jonson

Saha Institute of Nuclear Physics

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

N. Kalantar-Nayestanaki

Rijksuniversiteit Groningen

Saha Institute of Nuclear Physics

T. Kröll

Technische Universität Darmstadt

Technische Universität München

Saha Institute of Nuclear Physics

R. Krucken

Technische Universität München

Saha Institute of Nuclear Physics

J. Kurcewicz

Helmholtz

C. Langer

Helmholtz

T. Le Bleis

Technische Universität München

Saha Institute of Nuclear Physics

Y. Leifels

Helmholtz

J. Marganiec

Helmholtz

Saha Institute of Nuclear Physics

G. Munzenberg

Helmholtz

Thomas Nilsson

Saha Institute of Nuclear Physics

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

C. Nociforo

Helmholtz

V. Panin

Helmholtz

S. Paschalis

Saha Institute of Nuclear Physics

University of Liverpool

R. Plag

Helmholtz

R. Reifarth

Helmholtz

M.V. Ricciardi

Helmholtz

C. Rigollet

Saha Institute of Nuclear Physics

Rijksuniversiteit Groningen

D. Rossi

Helmholtz

Technische Universität Darmstadt

C. Scheidenberger

Justus-Liebig-Universität Gießen

Helmholtz

Saha Institute of Nuclear Physics

H. Scheit

Technische Universität Darmstadt

H. Simon

Helmholtz

Y. Togano

Helmholtz

Saha Institute of Nuclear Physics

Rikkyo University

S. Typel

Technische Universität Darmstadt

Helmholtz

Y. Utsuno

Japan Atomic Energy Agency

Saha Institute of Nuclear Physics

A. Wagner

Helmholtz

Homi Bhabha National Institute (HBNI)

F. Wamers

Helmholtz

H. Weick

Helmholtz

J. S. Winfield

Helmholtz

Physical Review C

24699985 (ISSN) 24699993 (eISSN)

Vol. 104 4 045801

Ämneskategorier

Acceleratorfysik och instrumentering

Subatomär fysik

Atom- och molekylfysik och optik

DOI

10.1103/PhysRevC.104.045801

Mer information

Senast uppdaterat

2021-10-27