$\beta$-decay and $\beta$-delayed Neutron Emission Measurements at GSI-FRS Beyond N=126, for r-process Nucleosynthesis

New measurements of very exotic nuclei in the neutron-rich region beyond N=126 have been performed at the GSI facility with the fragment separator (FRS). The aim of the experiment is to determine half-lives and beta-delayed neutron emission branching ratios of isotopes of Hg, Tl and Pb in this regio...

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Detalles Bibliográficos
Autores principales: Caballero-Folch, R, Domingo-Pardo, C, Cortès, G, Taín, J L, Agramunt, J, Algora, A, Ameil, F, Ayyad, Y, Benlliure, J, Bowry, M, Calviño, F, Cano-Ott, D, Davinson, T, Dillmann, I, Estrade, A, Evdokimov, A, Faestermann, T, Farinon, F, Galaviz, D, García-Ríos, A, Geissel, H, Gelletly, W, Gernhäuser, R, Gómez-Hornillos, M B, Guerrero, C, Heil, M, Hinke, C, Knöbel, R, Kojouharov, I, Kurcewicz, J, Kurz, N, Litvinov, Y, Maier, L, Marganiec, J, Marta, M, Martínez, T, Montes, F, Mukha, I, Napoli, D R, Nociforo, C, Paradela, C, Pietri, S, Podolyák, Zs, Prochazka, A, Rice, S, Riego, A, Rubio, B, Schaffner, H, Scheidenberger, C, Smith, K, Sokol, E, Steiger, K, Sun, B, Takechi, M, Testov, D, Weick, H, Wilson, E, Winfield, J S, Wood, R, Woods, P J, Yeremin, A
Lenguaje:eng
Publicado: 2014
Materias:
XX
Acceso en línea:https://dx.doi.org/10.1016/j.nds.2014.07.012
http://cds.cern.ch/record/2109970
Descripción
Sumario:New measurements of very exotic nuclei in the neutron-rich region beyond N=126 have been performed at the GSI facility with the fragment separator (FRS). The aim of the experiment is to determine half-lives and beta-delayed neutron emission branching ratios of isotopes of Hg, Tl and Pb in this region. This contribution summarizes final counting statistics for identification and for implantation, as well as the present status of the data analysis of the half-lives. In summary, isotopes of Pt, Au, Hg, Ti, Pb, Bi, Po, At, Rn and Fr were clearly identified and several of them (Hg208-211, Tl211-215, Pb214-218) were implanted with enough statistics to determine their half-lives. About half of them are expected to be neutron emitters, in such cases it will become possible to obtain the neutron emission probabilities, P-n.

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