Neutron capture cross sections for the Re/Os clock

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 and Wisshak, K. (2005) Neutron capture cross sections for the Re/Os clock. American Institute of Physics (AIP).
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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.
Item Type Other
Keywords W-185; ISOTOPES; COSMOCHRONOLOGY; S-PROCESS; NUCLEOSYNTHESIS
Date Deposited 29 May 2025 09:03
Last Modified 29 May 2025 09:03

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