To access the full text documents, please follow this link: http://hdl.handle.net/2117/11138

Measurement of the radiative neutron capture cross section of 206Pb and its astrophysical implications
Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme
Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. GREENER - Grup de recerca d´estudis energètics i de les radiacions
The (n, γ ) cross section of 206Pb has been measured at the CERN n TOF facility with high resolution in the energy range from 1 eV to 620 keV by using two optimized C6D6 detectors. In the investigated energy interval about 130 resonances could be observed, from which 61 had enough statistics to be reliably analyzed via the R-matrix analysis code SAMMY. Experimental uncertainties were minimized, in particular with respect to (i) angular distribution effects of the prompt capture γ -rays, and to (ii) the TOF-dependent background due to sample-scattered neutrons. Other background components were addressed by background measurements with an enriched 208Pb sample. The effect of the lower energy cutoff in the pulse height spectra of the C6D6 detectors was carefully corrected via Monte Carlo simulations. Compared to previous 206Pb values, the Maxwellian averaged capture cross sections derived from these data are about 20% and 9% lower at thermal energies of 5 keV and 30 keV, respectively. These newresults have a direct impact on the s-process abundance of 206Pb,which represents an important test for the interpretation of the cosmic clock based on the decay of 238U.
Peer Reviewed
Àrees temàtiques de la UPC::Física
Radiative capture
Stars--Structure.
Radiació
Estels -- Estructura
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
Article
         

Show full item record

Related documents

Other documents of the same author

Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme
Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme
Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Poch Parés, Agustí; Pretel Sánchez, Carme
Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Pretel Sánchez, Carme; Poch Parés, Agustí
Ventura, A.; Villamarin, D.; Lamboudis, C.; Vincente, M.C.; Vlachoudis, V.; Lindote, A.; Tassan-Got, L.; Leeb, H.; Tavora, L.; Lozano, M.; Vannini, G.; Carrapico, C.; Cennini, P.; Cano-Ott, D.; Capote, R.; Becvar, F.; Calviani, M.; Tain, J.L.; Tagliente, G.; Rullhusen, P.; Salgado, J.; Stephan, C.; Rubbia, C.; Rudolf, G.; Savvidis, I.; Santos, C.; Sarchiapone, L.; Reifarth, R.; Rauscher, T.; Quesada, J.; Plompen, A.; Poch Parés, Agustí; Plukis, A.; Pretel Sánchez, Carme; Paradela, C.; Pavlopoulos, P.; Perrot, L.; Pigni, M.T.; Papadopoulos, C.; Pavlik, A.; Patronis, N.; Baumann, P.; Badurek, G.; Pancin, J.; Audouin, L.; Papachristodoulou, C.; Assimakopoulos, P.; Andriamonje, S.; Oberhummer, H.; Andrzejewski, J.; O'Brien, S.; Milazzo, P.M.; Álvarez-Velarde, H.; Neves, F.; Álvarez, H.; Abbondanno, U.; Gallino, R.; Calviño Tavares, Francisco; Mastinu, P.; Massimi, C.; Lopes, I.; Marrone, S.; Marganiec, J.; Lukic, S.; Vaz, P.; Vlastou, R.; Voss, F.; Terlizzi, R.; Karadimos, D.; Mosconi, M.; Karamanis, D.; Heil, M.; Kerveno, M.; Kappeler, F; Koehler, P.; Plag, R.; Kossionides, E.; Mengoni, A.; Krticka, M.; Fujii, K.; Domingo-Pardo, C.; Aerts, G.; Kadi, Y.; The n_TOF Collaboration; Jericha, E.; Igashira, M.; Wiescher, M.; Herrera-Martinez, A.; Wisshak, K.; Gramegna, F.; Walter, S.; Guerrero, C.; Goncalves, I.; Gonzalez-Romero, E.; Haight, R.; Gunsing, F.; Haas, B.; Ferrari, A.; Furman, W.; Ferreira-Marques, R.; Duran, I.; Eleftheriadis, C.; Embid-Segura, M.; Ferrant, L.; Dahlfors, M.; David, S.; Dillmann, I.; Dridi, W.; Cox, J.; Couture, A.; Cortés Rossell, Guillem Pere; Chepel, V.; Colonna, N.
 

Coordination

 

Supporters