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

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

doi:10.1088/1742-6596/665/1/012045

Article
Report number	arXiv:1309.3047
Title	Approaching the precursor nuclei of the third r-process peak with RIBs
Related title	Approaching the precursor nuclei of the third r-process peak with RIBs
Author(s)	Domingo-Pardo, C. (Valencia U., IFIC) ; Caballero-Folch, R. (Barcelona, Polytechnic U.) ; Agramunt, J. (Valencia U., IFIC) ; Algora, A. (Valencia U., IFIC ; Debrecen, Inst. Nucl. Res.) ; Arcones, A. (Darmstadt, GSI) ; Ameil, F. (Darmstadt, GSI) ; Ayyad, Y. (Santiago de Compostela U., IGFAE) ; Benlliure, J. (Santiago de Compostela U., IGFAE) ; Bowry, M. (Surrey U.) ; Calvino, F. (Debrecen, Inst. Nucl. Res.) ; Cano-Ott, D. (Madrid, CIEMAT) ; Cortes, G. (Barcelona, Polytechnic U.) ; Davinson, T. (Edinburgh U.) ; Dillmann, I. (Darmstadt, GSI ; Giessen U.) ; Estrade, A. (Darmstadt, GSI ; St. Mary's U., Halifax) ; Evdokimov, A. (Darmstadt, GSI ; Giessen U.) ; Faestermann, T. (Munich, Tech. U.) ; Farinon, F. (Darmstadt, GSI) ; Galaviz, D. (Lisbon U., CFNUL) ; Garcia-Rios, A. (Madrid, CIEMAT) ; Geissel, H. (Darmstadt, GSI ; Giessen U.) ; Gelletly, W. (Surrey U.) ; Gernhauser, R. (Munich, Tech. U.) ; Gomez-Hornillos, M.B. (Debrecen, Inst. Nucl. Res.) ; Guerrero, C. (CERN) ; Heil, M. (Darmstadt, GSI) ; Hinke, C. (Munich, Tech. U.) ; Knobel, R. (Darmstadt, GSI) ; Kojouharov, I. (Darmstadt, GSI) ; Kurcewicz, J. (Darmstadt, GSI) ; Kurz, N. (Darmstadt, GSI) ; Litvinov, Y. (Darmstadt, GSI) ; Maier, L. (Munich, Tech. U.) ; Marganiec, J. (Darmstadt, EMMI) ; Marta, M. (Darmstadt, GSI ; Giessen U.) ; Martinez, T. (Madrid, CIEMAT) ; Martinez-Pinedo, G. (Darmstadt, GSI) ; Meyer, B.S. (Clemson U.) ; Montes, F. (Michigan State U., NSCL ; Michigan State U., JINA) ; Mukha, I. (Darmstadt, GSI) ; Napoli, D.R. (INFN, Legnaro) ; Nociforo, Ch. (Darmstadt, GSI) ; Paradela, C. (Santiago de Compostela U., IGFAE) ; Pietri, S. (Darmstadt, GSI) ; Podolyak, Z. (Surrey U.) ; Prochazka, A. (Darmstadt, GSI) ; Rice, S. (Surrey U.) ; Riego, A. (Barcelona, Polytechnic U.) ; Rubio, B. (Valencia U., IFIC) ; Schaffner, H. (Darmstadt, GSI) ; Scheidenberger, Ch. (Darmstadt, GSI ; Giessen U.) ; Smith, K. (Notre Dame U.) ; Sokol, E. (Dubna, JINR) ; Steiger, K. (Munich, Tech. U.) ; Sun, B. (Darmstadt, GSI) ; Tain, J.L. (Valencia U., IFIC) ; Takechi, M. (Darmstadt, GSI) ; Testov, D. (Dubna, JINR ; Orsay, IPN) ; Weick, H. (Darmstadt, GSI) ; Wilson, E. (Surrey U.) ; Winfield, J.S. (Darmstadt, GSI) ; Wood, R. (Surrey U.) ; Woods, P. (Edinburgh U.) ; Yeremin, A. (Dubna, JINR)
Publication	2016-01-05
Imprint	12 Sep 2013
Number of pages	8
Note	Comments: Nuclear Physics in Astrophysics VI, Lisbon 2013, Conference Proceedings Nuclear Physics in Astrophysics VI, Lisbon 2013, Conference Proceedings
In:	J. Phys.: Conf. Ser. 665 (2016) 012045
DOI	10.1088/1742-6596/665/1/012045
Subject category	nucl-ex ; Nuclear Physics - Experiment
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 $^{238}$U beam at GSI we were able to measure such properties for several neutron-rich nuclei from $^{208}$Hg to $^{218}$Pb. 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 $N\sim126$ are required for a reliable modelling of the underlying nuclear structure, and for performing more realistic $r$-process abundance calculations.
Copyright/License	arXiv nonexclusive-distrib. 1.0 publication: (License: CC-BY-3.0)

$(Left) $^{212}$Tl Implant-$\beta$ time correlations in the forward direction (solid symbols) and in the backward direction (open symbols) for all decay events within the implant pixel and the 8 neighbouring pixels. All decay events over a broad time window of several times the expected half-life were considered. (Right) Background subtracted correlation spectrum. The quoted half-life value is preliminary.$ $(Left) Comparison between theoretical predictions and measurements in the region around $N=126$. Experimental values from $^{194}$Re to $^{204}$Pt are from Ref.~\cite{Benlliure12}, values between $^{211}$Tl and $^{219}$Bi are from Ref.~\cite{Benzoni12}. (Right) Theoretical values published in the literature for the waiting point nuclei along $N=126$ (adapted from Ref.\cite{Zhi13}).$ $(Left) Comparison between theoretical predictions and measurements in the region around $N=126$. Experimental values from $^{194}$Re to $^{202}$Ir are from Ref.~\cite{Kurtukian09}, values between $^{211}$Tl and $^{219}$Bi are from Ref.~\cite{Benzoni12}. (Right) Theoretical values published in the literature for the waiting point nuclei along $N=126$ (adapted from Ref.\cite{Zhi13}).$ Show more plots

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