Advanced

Determination of the neutron-capture rate of C 17 for r -process nucleosynthesis

Heine, M.; Typel, S.; Wu, M. R.; Adachi, T; Aksyutina, Y.; Alcantara, J.; Altstadt, S.; Alvarez-Pol, H; Ashwood, N. and Atar, L., et al. (2017) In Physical Review C: covering nuclear physics 95(1).
Abstract

With the RB3-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of C18 at a projectile energy around 425A MeV on a lead target, which are needed to determine the radiative neutron-capture cross sections of C17 into the ground state of C18. Those data have been used to constrain theoretical calculations for transitions populating excited states in C18. This allowed to derive the astrophysical cross section σnγ∗ accounting for the thermal population of C17 target states in astrophysical scenarios. The experimentally verified capture rate is significantly lower than those of previously obtained Hauser-Feshbach estimations at temperatures T9≤1 GK. Network simulations with updated neutron-capture... (More)

With the RB3-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of C18 at a projectile energy around 425A MeV on a lead target, which are needed to determine the radiative neutron-capture cross sections of C17 into the ground state of C18. Those data have been used to constrain theoretical calculations for transitions populating excited states in C18. This allowed to derive the astrophysical cross section σnγ∗ accounting for the thermal population of C17 target states in astrophysical scenarios. The experimentally verified capture rate is significantly 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 influence of neutron capture of C17 on the production of second- and third-peak elements in contrast to earlier sensitivity studies.

(Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C: covering nuclear physics
volume
95
issue
1
publisher
American Physical Society
external identifiers
  • scopus:85015197719
  • wos:000399784100005
ISSN
2469-9985
DOI
10.1103/PhysRevC.95.014613
language
English
LU publication?
yes
id
a7e49693-f469-4f99-80d1-9756f955a9d3
date added to LUP
2017-03-30 08:35:47
date last changed
2018-02-11 04:27:38
@article{a7e49693-f469-4f99-80d1-9756f955a9d3,
  abstract     = {<p>With the RB3-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of C18 at a projectile energy around 425A MeV on a lead target, which are needed to determine the radiative neutron-capture cross sections of C17 into the ground state of C18. Those data have been used to constrain theoretical calculations for transitions populating excited states in C18. This allowed to derive the astrophysical cross section σnγ∗ accounting for the thermal population of C17 target states in astrophysical scenarios. The experimentally verified capture rate is significantly 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 influence of neutron capture of C17 on the production of second- and third-peak elements in contrast to earlier sensitivity studies.</p>},
  articleno    = {014613},
  author       = {Heine, M. and Typel, S. and Wu, M. R. and Adachi, T and Aksyutina, Y. and Alcantara, J. and Altstadt, S. and Alvarez-Pol, H and Ashwood, N. and Atar, L. and Aumann, T. and Avdeichikov, V. and Barr, M. and Beceiro-Novo, S. and Bemmerer, D. and Benlliure, J. and Bertulani, C. A. and Boretzky, K. and Borge, M. J. G. and Burgunder, G. and Caamano, M and Caesar, C. and Casarejos, E. and Catford, W. and Cederkäll, J. and Chakraborty, S. and Chartier, M. and Chulkov, L. V. and Cortina-Gil, D and Crespo, R. and Datta Pramanik, U and Diaz Fernandez, P. and Dillmann, I. and Elekes, Z. and Enders, J and Ershova, O. and Estrade, A. and Farinon, F. and Fraile, L. M. and Freer, M. and Freudenberger, M. and Fynbo, H O U and Galaviz, D. and Geissel, H. and Gernhäuser, R and Göbel, Kathrin and Golubev, P. and Diaz-Gonzalez, Federico and Hagdahl, J. and Heftrich, T. and Heil, M. and Heinz, A. and Henriques, A. and Holl, M. and Ickert, G. and Ignatov, A. and Jakobsson, B. and Johansson, H. T. and Jonson, B. and Kalantar-Nayestanaki, N. and Kanungo, R. and Kelic-Heil, A. and Knöbel, R. and Kröll, T and Krücken, R and Kurcewicz, J. and Kurz, N. and Labiche, M. and Langer, C. and Le Bleis, T. and Lemmon, R. and Lepyoshkina, O. and Lindberg, S. and Machado, J. and Marganiec, J. and Martínez-Pinedo, G. and Maroussov, V. and Mostazo, M. and Movsesyan, A. and Najafi, A. and Neff, T. and Nilsson, T. and Nociforo, C. and Panin, V. and Paschalis, S. and Perea, A. and Petri, M and Pietri, S. and Plag, R. and Prochazka, A. and Rahaman, A. and Rastrepina, G. and Reifarth, R. and Ribeiro, G. and Ricciardi, M. V. and Rigollet, C. and Riisager, K. and Röder, Marko and Rossi, D and Sanchez del Rio, J. and Savran, D. and Scheit, H. and Simon, H and Sorlin, O. and Stoica, V. and Streicher, B. and Taylor, J. T. and Tengblad, O and Terashima, S. and Thies, R. and Togano, Y. and Uberseder, E. and de Walle, J. Van and Velho, P. and Volkov, V and Wagner, A and Wamers, F. and Weick, H and Weigand, M. and Wheldon, C and Wilson, G. and Wimmer, C. and Winfield, J. S. and Woods, P. and Yakorev, D. and Zhukov, M V and Zilges, A and Zuber, K. and , },
  issn         = {2469-9985},
  language     = {eng},
  month        = {01},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {	Physical Review C: covering nuclear physics},
  title        = {Determination of the neutron-capture rate of C 17 for r -process nucleosynthesis},
  url          = {http://dx.doi.org/10.1103/PhysRevC.95.014613},
  volume       = {95},
  year         = {2017},
}