Approaching the precursor nuclei of the third r-process peak with RIBs

C. Domingo-Pardo, R. Caballero-Folch, J. Agramunt, A. Algora, A. Arcones, F. Ameil, Y. Ayyad, J. Benlliure, M. Bowry, F. Calviño, D. Cano-Ott, G. Cortés, T. Davinson, I. Dillmann, A. Estrade, A. Evdokimov, T. Faestermann, F. Farinon, D. Galaviz, A. García-RiosH. Geissel, W. Gelletly, R. Gernhäuser, M. B. Gómez-Hornillos, C. Guerrero, M. Heil, C. Hinke, R. Knöbel, I. Kojouharov, J. Kurcewicz, N. Kurz, Y. Litvinov, L. Maier, J. Marganiec, M. Marta, T. Martínez, G. Martínez-Pinedo, B. S. Meyer, F. Montes, I. Mukha, D. R. Napoli, Ch Nociforo, C. Paradela, S. Pietri, Z. Podolyák, A. Prochazka, S. Rice, A. Riego, B. Rubio, H. Schaffner, Ch Scheidenberger, K. Smith, E. Sokol, K. Steiger, B. Sun, J. L. Taín, M. Takechi, D. Testov, H. Weick, E. Wilson, J. S. Winfield, R. Wood, P. Woods, A. Yeremin

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2 Citations (Scopus)

Abstract

The rapid neutron nucleosynthesis process involves an enormous amount of very exotic neutron-rich nuclei, which represent a theoretical and experimental challenge. Two of the main decay properties that affect the final abundance distribution the most are half-lives and neutron branching ratios. Using fragmentation of a primary 238U beam at GSI we were able to measure such properties for several neutron-rich nuclei from 208Hg to 218Pb. This contribution provides a short update on the status of the data analysis of this experiment, together with a compilation of the latest results published in this mass region, both experimental and theoretical. The impact of the uncertainties connected with the beta-decay rates and with beta-delayed neutron emission is illustrated on the basis of r-process network calculations. In order to obtain a reasonable reproduction of the third r-process peak, it is expected that both half-lives and neutron branching ratios are substantially smaller, than those based on FRDM+QRPA, commonly used in r-process model calculations. Further measurements around N ∼ 126 are required for a reliable modelling of the underlying nuclear structure, and for performing more realistic r-process abundance calculations.

Original languageEnglish
Article number012045
JournalJournal of Physics: Conference Series
Volume665
Issue number1
DOIs
Publication statusPublished - Jan 5 2016
Event6th Nuclear Physics in Astrophysics, NPA 2013 - Lisbon, Portugal
Duration: May 19 2013May 24 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Domingo-Pardo, C., Caballero-Folch, R., Agramunt, J., Algora, A., Arcones, A., Ameil, F., Ayyad, Y., Benlliure, J., Bowry, M., Calviño, F., Cano-Ott, D., Cortés, G., Davinson, T., Dillmann, I., Estrade, A., Evdokimov, A., Faestermann, T., Farinon, F., Galaviz, D., ... Yeremin, A. (2016). Approaching the precursor nuclei of the third r-process peak with RIBs. Journal of Physics: Conference Series, 665(1), [012045]. https://doi.org/10.1088/1742-6596/665/1/012045