The measurement of the (206)Pb(n,gamma) cross section and stellar implications (Journal article)

Domingo-Pardo, C./ Abbondanno, U./ Aerts, G./ Alvarez, H./ Alvarez-Velarde, F./ Andriamonje, S./ Andrzejewski, J./ Assimakopoulos, P./ Audouin, L./ Badurek, G./ Baumann, P./ Becvar, F./ Berthoumieux, E./ Bisterzo, S./ Calvino, F./ Calviani, M./ Cano-Ott, D./ Capote, R./ Carrapico, C./ Cennini, P./ Chepel, V./ Colonna, N./ Cortes, G./ Couture, A./ Cox, J./ Dahlfors, M./ David, S./ Dillmann, I./ Dridi, W./ Duran, I./ Eleftheriadis, C./ Embid-Segura, M./ Ferrant, L./ Ferrari, A./ Ferreira-Marques, R./ Fujii, K./ Furman, W./ Gallino, R./ Goncalves, I./ Gonzalez-Romero, E./ Gramegna, F./ Guerrero, C./ Gunsing, F./ Haas, B./ Haight, R./ Heil, M./ Herrera-Martinez, A./ Igashira, M./ Jericha, E./ Kadi, Y./ Kappeler, F./ Karadimos, D./ Karamanis, D./ Kerveno, M./ Koehler, P./ Kossionides, E./ Krticka, M./ Lamboudis, C./ Leeb, H./ Lindote, A./ Lopes, I./ Lozano, M./ Lukic, S./ Marganiec, J./ Marrone, S./ Massimi, C./ Mastinu, P./ Mengoni, A./ Milazzo, P. M./ Mosconi, M./ Neves, F./ Oberhummer, H./ O'Brien, S./ Pancin, J./ Papachristodoulou, C./ Papadopoulos, C./ Paradela, C./ Patronis, N./ Pavlik, A./ Pavlopoulos, P./ Perrot, L./ Pigni, M. T./ Plag, R./ Plompen, A./ Plukis, A./ Poch, A./ Pretel, C./ Quesada, J./ Rauscher, T./ Reifarth, R./ Rubbia, C./ Rudolf, G./ Rullhusen, P./ Salgado, J./ Santos, C./ 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./ Wiescher, M./ Wisshak, K.


The neutron capture cross section of (206)Pb has been measured at the CERN n_TOF spectrometer using a setup of two C(6)D(6) detectors. In the energy interval from 1 eV to 600 keV the cross section is dominated by resonances, which were analyzed via the R-matrix analysis code SAMMY. In the relevant energy ranges for stellar nucleosynthesis, i. e., at thermal energies of kT = 8 keV and kT = 23 keV, the present Maxwellian average cross section differs by 20% and 9% from the recommended values of Bao et al respectively. From the new cross section the s-abundance of (206)Pb could be reliably determined as 70( 4)%. This result is of importance in order to test and constrain r-process abundance calculations in the actinide region, because the r-process portion of (206)Pb is dominated by alpha-back decays of short-lived transbismuth isotopes.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: galactic chemical evolution,neutron-capture,stars,elements,chronometers,lead
URI: http://olympias.lib.uoi.gr/jspui/handle/123456789/16683
ISSN: 0954-3899
Link: <Go to ISI>://000252019800021
http://iopscience.iop.org/0954-3899/35/1/014020/pdf/0954-3899_35_1_014020.pdf
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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