Resonance capture cross section of Pb-207 (Journal article)

Domingo-Pardo, C./ Abbondanno, U./ Aerts, G./ Alvarez-Pol, H./ Alvarez-Velarde, F./ Andriamonje, S./ Andrzejewski, J./ Assimakopoulos, P./ Audouin, L./ Badurek, G./ Baumann, P./ Becvar, F./ Berthoumieux, E./ Bisterzo, S./ Calvino, F./ Cano-Ott, D./ Capote, R./ Carrapico, C./ Cennini, P./ Chepel, V./ Chiaveri, E./ Colonna, N./ Cortes, G./ Couture, A./ Cox, J./ Dahlfors, M./ David, S./ Dillman, I./ Dolfini, R./ Dridi, W./ Duran, I./ Eleftheriadis, C./ Embid-Segura, M./ Ferrant, L./ Ferrari, A./ Ferreira-Marques, R./ Fitzpatrick, L./ Frais-Koelbl, H./ Fujii, K./ Furman, W./ Gallino, R./ Goncalves, I./ Gonzalez-Romero, E./ Goverdovski, A./ Gramegna, F./ Griesmayer, E./ Guerrero, C./ Gunsing, F./ Haas, B./ Haight, R./ Heil, M./ Herrera-Martinez, A./ Igashira, M./ Isaev, S./ Jericha, E./ Kadi, Y./ Kappeler, F./ Karamanis, D./ Karadimos, D./ Kerveno, M./ Ketlerov, V./ Koehler, P./ Konovalov, V./ Kossionides, E./ Krticka, M./ Lamboudis, C./ Leeb, H./ Lindote, A./ Lopes, I./ Lozano, M./ Lukic, S./ Marganiec, J./ Marrone, S./ Mastinu, P./ Mengoni, A./ Milazzo, P. M./ Moreau, C./ Mosconi, M./ Neves, F./ Oberhummer, H./ Oshima, M./ O'Brien, S./ Pancin, J./ Papachristodoulou, C./ Papadopoulos, C./ Paradela, C./ Patronis, N./ Pavlik, A./ Pavlopoulos, P./ 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, P./ Salgado, J./ Sarchiapone, L./ Savvidis, I./ Stephan, C./ Tagliente, G./ Tain, J. L./ Tassan-Got, L./ Tavora, L./ Terlizzi, R./ Vannini, G./ Vaz, P./ Ventura, A./ Villamarin, D./ Vincente, M. C./ Vlachoudis, V./ Vlastou, R./ Voss, F./ Walter, S./ Wendler, H./ Wiescher, M./ Wisshak, K.

The radiative neutron capture cross section of Pb-207 has been measured at the CERN neutron time of flight installation n_TOF using the pulse height weighting technique in the resolved energy region. The measurement has been performed with an optimized setup of two C6D6 scintillation detectors, which allowed us to reduce scattered neutron backgrounds down to a negligible level. Resonance parameters and radiative kernels have been determined for 16 resonances by means of an R-matrix analysis in the neutron energy range from 3 keV to 320 keV. Good agreement with previous measurements was found at low neutron energies, whereas substantial discrepancies appear beyond 45 keV. With the present results, we obtain an s-process contribution of 77 +/- 8% to the solar abundance of Pb-207. This corresponds to an r-process component of 23 +/- 8%, which is important for deriving the U/Th ages of metal poor halo stars.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: galactic chemical evolution,giant branch stars,neutron-capture,abundances,elements,solar,nucleosynthesis,chronometers
URI: https://olympias.lib.uoi.gr/jspui/handle/123456789/17227
ISSN: 0556-2813
Link: <Go to ISI>://000242409500056
http://prc.aps.org/abstract/PRC/v74/i5/e055802
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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