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Determination of the Neutron-Capture Rate of 17C for the R-process Nucleosynthesis

Heine, M, Typel, S, Wu, M-R, Adachi, T, Aksyutina, Y, Alcantara, J, Altstadt, S, Alvarez-Pol, H, Ashwood, N, Aumann, T , Avdeichikov, V, Barr, M, Beceiro-Novo, S, Bemmerer, D, Benlliure, J, Bertulani, CA, Catford, Wilton and Wilson, G (2017) Determination of the Neutron-Capture Rate of 17C for the R-process Nucleosynthesis Physical Review C: Nuclear Physics, 95 (1), 014613.

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Abstract

With the R3B-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of 18C at a projectile energy around 425 AMeV on a lead target, which are needed to determine the radiative neutron-capture cross sections of 17C into the ground state of 18C. Those data have been used to constrain theoretical calculations for transitions populating excited states in 18C. This allowed to derive the astrophysical cross section n accounting for the thermal population of 17C target states in astrophysical scenarios. The experimentally veri ed capture rate is signi cantly lower than those of previously obtained Hauser-Feshbach estimations at temperatures T9 1 GK. Network simulations with updated neutron-capture rates and hydrodynamics according to the neutrino-driven wind model as well as the neutron-star merger scenario reveal no pronounced in uence of neutron capture of 17C on the production of second- and third-peak elements in contrast to earlier sensitivity studies.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Heine, MUNSPECIFIEDUNSPECIFIED
Typel, SUNSPECIFIEDUNSPECIFIED
Wu, M-RUNSPECIFIEDUNSPECIFIED
Adachi, TUNSPECIFIEDUNSPECIFIED
Aksyutina, YUNSPECIFIEDUNSPECIFIED
Alcantara, JUNSPECIFIEDUNSPECIFIED
Altstadt, SUNSPECIFIEDUNSPECIFIED
Alvarez-Pol, HUNSPECIFIEDUNSPECIFIED
Ashwood, NUNSPECIFIEDUNSPECIFIED
Aumann, TUNSPECIFIEDUNSPECIFIED
Avdeichikov, VUNSPECIFIEDUNSPECIFIED
Barr, MUNSPECIFIEDUNSPECIFIED
Beceiro-Novo, SUNSPECIFIEDUNSPECIFIED
Bemmerer, DUNSPECIFIEDUNSPECIFIED
Benlliure, JUNSPECIFIEDUNSPECIFIED
Bertulani, CAUNSPECIFIEDUNSPECIFIED
Catford, WiltonW.Catford@surrey.ac.ukUNSPECIFIED
Wilson, GUNSPECIFIEDUNSPECIFIED
Date : 30 January 2017
Identification Number : 10.1103/PhysRevC.95.014613
Copyright Disclaimer : Copyright 2017 American Physical Society
Uncontrolled Keywords : Coulomb dissociation, radiative neutron capture, nucleosynthesis, r-process
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 01 Feb 2017 12:53
Last Modified : 31 Oct 2017 19:05
URI: http://epubs.surrey.ac.uk/id/eprint/813424

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