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        Neutron capture cross sections for the Re/Os clock

        Author
        Mosconi, M.
        Mengoni, A.
        Heil, M.
        Kappeler, F.
        Aerts, G.
        Terlizzi, R.
        Abbondanno, U.
        Alvarez, H.
        Alvarez-Velarde, F.
        Andriamojie, S.
        Andrzejewski, J.
        Assimakopoulos, R.
        Audouin, L.
        Badurek, G.
        Baumann, P.
        Becvar, F.
        Benlliure, J.
        Berthoumieux, E.
        Calvino, F.
        Cano-Ott, D.
        Capote, R.
        de Albornoz, A.C.
        Cennini, R.
        Chiaveri, E.
        Colonna, N.
        Cortes, G.
        Cortina, D.
        Couture, A.
        Cox, J.
        David, S.
        Dolfini, R.
        Domingo-Pardo, C.
        Dridi, W.
        Duran, R.B.
        Embid-Segura, M.
        Ferrant, L.
        Ferrari, A.
        Fitzpatrick, L.
        Ferreira-Marques, R.
        Frais-Kolbl, H.
        Fujii, K.
        Furman, W.
        Guerrero, C.
        Goncalves, I. F.
        Gallino, R.
        Gonzalez-Romero, E.
        Goverdovski, A.
        Gramegna, F.
        Griesmayer, E.
        Gunsing, F.
        Haas, B.
        Haight, R.
        Herrera-Martinez, A.
        Igashira, M.
        Isaev, S.
        Jericha, E.
        Kadi, Y.
        Karamanis, D.
        Karadimos, D.
        Kerveno, M.
        Ketlerov, V.
        Koehler, R.
        Konovalov, V.
        Kossionides, E.
        Krticka, M.
        Lamboudis, C.
        Leeb, H.
        Lindote, A.
        Lopes, I.
        Lozano, M.
        Lukic, S.
        Marganiec, J.
        Marques, L.
        Martone, S.
        Mastinu, R.
        Milazzo, R.
        Moreau, C.
        Neves, F.
        Oberhummer, H.
        O'Brien, S.
        Oshima, M.
        Pancin, J.
        Papachristodoulou, C.
        Papadopoulos, C.
        Paradela, C.
        Patronis, N.
        Pavlik, A.
        Pavlopoulos, R.
        Perrot, L.
        Plag, R.
        Plompen, A.
        Plukis, A.
        Poch, A.
        Pretel, C.
        Quesada, J.
        Rauscher, T.
        Reifarth, R.
        Rosetti, M.
        Rubbia, C.
        Rudolf, G.
        Rullhusen, R.
        Salgado, J.
        Sarchiapone, L.
        Stephan, C.
        Tagliente, G.
        Tain, J. L.
        Tassan-Got, L.
        Tavora, L.
        Vannini, G.
        Vaz, R.
        Ventura, A.
        Villamarin, D.
        Vincente, M. C.
        Vlachoudis, V.
        Vlastou, R.
        Voss, F.
        Wendle, H.
        Wiescher, Michael
        Wisshak, K.
        Attention
        2299/14875
        Abstract
        The radioactive decay of (187)Re -> (187)Os (t(1/2) = 43 Gyr) is suited for dating the onset of heavy-element nucleosynthesis. The radiogenic contribution to the (187)Os abundance is the difference between the natural abundance and the corresponding s-process component. This component can be obtained via the well-established sigma N systematics using the neighboring s-only isotope (186)Os, provided the neutron-capture cross sections of both isotopes are known with sufficient accuracy. We report on a new set of experiments performed with a C(6)D(6) detector array at the n_TOF neutron spallation facility of CERN. The capture cross sections of (186)Os, (187)Os, and (188)Os have been measured in the neutron-energy range between 1 eV and 1 MeV, and Maxwellian-averaged cross sections were deduced for the relevant thermal energies from kT = 5 keV to 100 keV.
        Publication date
        2005
        Published in
        Int Conf on Nuclear Data for Science and Technology, Parts 1 and 2
        Other links
        http://hdl.handle.net/2299/14875
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