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

M. Heine; S. Typel; M. R. Wu; T Adachi; Y. Aksyutina; J. Alcantara; S. Altstadt; H Alvarez-Pol; N. Ashwood; L. Atar; T. Aumann; V. Avdeichikov; M. Barr; S. Beceiro-Novo; D. Bemmerer; J. Benlliure; C. A. Bertulani; K. Boretzky; M. J. G. Borge; G. Burgunder; M Caamano; C. Caesar; E. Casarejos; W. Catford; J. Cederkäll; S. Chakraborty; M. Chartier; L. V. Chulkov; D Cortina-Gil; R. Crespo; U Datta Pramanik; P. Diaz Fernandez; I. Dillmann; Z. Elekes; J Enders; O. Ershova; A. Estrade; F. Farinon; L. M. Fraile; M. Freer; M. Freudenberger; H O U Fynbo; D. Galaviz; H. Geissel; R Gernhäuser; Kathrin Göbel; P. Golubev; Federico Diaz-Gonzalez; J. Hagdahl; B. Jakobsson; R3B Collaboration

doi:10.1103/PhysRevC.95.014613

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

M. Heine, S. Typel, M. R. Wu, T Adachi, Y. Aksyutina, J. Alcantara, S. Altstadt, H Alvarez-Pol, N. Ashwood, L. Atar, T. Aumann, V. Avdeichikov, M. Barr, S. Beceiro-Novo, D. Bemmerer, J. Benlliure, C. A. Bertulani, K. Boretzky, M. J. G. Borge, G. BurgunderM Caamano, C. Caesar, E. Casarejos, W. Catford, J. Cederkäll, S. Chakraborty, M. Chartier, L. V. Chulkov, D Cortina-Gil, R. Crespo, U Datta Pramanik, P. Diaz Fernandez, I. Dillmann, Z. Elekes, J Enders, O. Ershova, A. Estrade, F. Farinon, L. M. Fraile, M. Freer, M. Freudenberger, H O U Fynbo, D. Galaviz, H. Geissel, R Gernhäuser, Kathrin Göbel, P. Golubev, Federico Diaz-Gonzalez, J. Hagdahl, B. Jakobsson, R3B Collaboration

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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 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.

Original language	English
Article number	014613
Journal	Physical Review C: covering nuclear physics
Volume	95
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.95.014613
Publication status	Published - 2017 Jan 30

Subject classification (UKÄ)

Subatomic Physics

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10.1103/PhysRevC.95.014613

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Heine, M., Typel, S., Wu, M. R., Adachi, T., Aksyutina, Y., Alcantara, J., Altstadt, S., Alvarez-Pol, H., Ashwood, N., Atar, L., Aumann, T., Avdeichikov, V., Barr, M., Beceiro-Novo, S., Bemmerer, D., Benlliure, J., Bertulani, C. A., Boretzky, K., Borge, M. J. G., ... R3B Collaboration (2017). Determination of the neutron-capture rate of C 17 for r -process nucleosynthesis. Physical Review C: covering nuclear physics, 95(1), Article 014613. https://doi.org/10.1103/PhysRevC.95.014613

@article{a7e49693f4694f9980d19756f955a9d3,

title = "Determination of the neutron-capture rate of C 17 for r -process nucleosynthesis",

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 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.",

author = "M. Heine and S. Typel and Wu, {M. R.} and T Adachi and Y. Aksyutina and J. Alcantara and S. Altstadt and H Alvarez-Pol and N. Ashwood and L. Atar and T. Aumann and V. Avdeichikov and M. Barr and S. Beceiro-Novo and D. Bemmerer and J. Benlliure and Bertulani, {C. A.} and K. Boretzky and Borge, {M. J. G.} and G. Burgunder and M Caamano and C. Caesar and E. Casarejos and W. Catford and J. Cederk{\"a}ll and S. Chakraborty and M. Chartier and Chulkov, {L. V.} and D Cortina-Gil and R. Crespo and {Datta Pramanik}, U and {Diaz Fernandez}, P. and I. Dillmann and Z. Elekes and J Enders and O. Ershova and A. Estrade and F. Farinon and Fraile, {L. M.} and M. Freer and M. Freudenberger and Fynbo, {H O U} and D. Galaviz and H. Geissel and R Gernh{\"a}user and Kathrin G{\"o}bel and P. Golubev and Federico Diaz-Gonzalez and J. Hagdahl and B. Jakobsson and {R3B Collaboration}",

year = "2017",

month = jan,

day = "30",

doi = "10.1103/PhysRevC.95.014613",

language = "English",

volume = "95",

journal = "Physical Review C: covering nuclear physics",

issn = "2469-9985",

publisher = "American Physical Society",

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Heine, M, Typel, S, Wu, MR, Adachi, T, Aksyutina, Y, Alcantara, J, Altstadt, S, Alvarez-Pol, H, Ashwood, N, Atar, L, Aumann, T, Avdeichikov, V, Barr, M, Beceiro-Novo, S, Bemmerer, D, Benlliure, J, Bertulani, CA, Boretzky, K, Borge, MJG, Burgunder, G, Caamano, M, Caesar, C, Casarejos, E, Catford, W, Cederkäll, J, Chakraborty, S, Chartier, M, Chulkov, LV, Cortina-Gil, D, Crespo, R, Datta Pramanik, U, Diaz Fernandez, P, Dillmann, I, Elekes, Z, Enders, J, Ershova, O, Estrade, A, Farinon, F, Fraile, LM, Freer, M, Freudenberger, M, Fynbo, HOU, Galaviz, D, Geissel, H, Gernhäuser, R, Göbel, K, Golubev, P, Diaz-Gonzalez, F, Hagdahl, J, Jakobsson, B & R3B Collaboration 2017, 'Determination of the neutron-capture rate of C 17 for r -process nucleosynthesis', Physical Review C: covering nuclear physics, vol. 95, no. 1, 014613. https://doi.org/10.1103/PhysRevC.95.014613

TY - JOUR

T1 - Determination of the neutron-capture rate of C 17 for r -process nucleosynthesis

AU - Heine, M.

AU - Typel, S.

AU - Wu, M. R.

AU - Adachi, T

AU - Aksyutina, Y.

AU - Alcantara, J.

AU - Altstadt, S.

AU - Alvarez-Pol, H

AU - Ashwood, N.

AU - Atar, L.

AU - Aumann, T.

AU - Avdeichikov, V.

AU - Barr, M.

AU - Beceiro-Novo, S.

AU - Bemmerer, D.

AU - Benlliure, J.

AU - Bertulani, C. A.

AU - Boretzky, K.

AU - Borge, M. J. G.

AU - Burgunder, G.

AU - Caamano, M

AU - Caesar, C.

AU - Casarejos, E.

AU - Catford, W.

AU - Cederkäll, J.

AU - Chakraborty, S.

AU - Chartier, M.

AU - Chulkov, L. V.

AU - Cortina-Gil, D

AU - Crespo, R.

AU - Datta Pramanik, U

AU - Diaz Fernandez, P.

AU - Dillmann, I.

AU - Elekes, Z.

AU - Enders, J

AU - Ershova, O.

AU - Estrade, A.

AU - Farinon, F.

AU - Fraile, L. M.

AU - Freer, M.

AU - Freudenberger, M.

AU - Fynbo, H O U

AU - Galaviz, D.

AU - Geissel, H.

AU - Gernhäuser, R

AU - Göbel, Kathrin

AU - Golubev, P.

AU - Diaz-Gonzalez, Federico

AU - Hagdahl, J.

AU - Jakobsson, B.

AU - R3B Collaboration

PY - 2017/1/30

Y1 - 2017/1/30

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85015197719&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.95.014613

DO - 10.1103/PhysRevC.95.014613

M3 - Article

AN - SCOPUS:85015197719

SN - 2469-9985

VL - 95

JO - Physical Review C: covering nuclear physics

JF - Physical Review C: covering nuclear physics

IS - 1

M1 - 014613

ER -

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

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