Measurement of the neutron capture cross section of the s-only isotope Pb-204 from 1 eV to 440 keV

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Title:	Measurement of the neutron capture cross section of the s-only isotope Pb-204 from 1 eV to 440 keV
Authors:	Domingo Pardo, César ; Abbondanno, U.; Aerts, G.; Álvarez-Pol, H.; Álvarez-Velarde, F.; Andriamonje, S.; Andrzejewski, J.; Assimakopoulos, P.; Audouin, L.; Badurek, G.; Baumann, P.; Dahlfors, M.; David, S.; Dillmann, I.; Embid-Segura, M.; Dolfini, R.; Dridi, W.; Durán, I.; Ferrant, L.; Ferrari, A.; Ferreira-Marques, R.; Haight, R.; Fitzpatrick, L.; Frais-Koelbl, H.; Fujii, K.; Furman, W.; Gallino, R.; Jericha, E.; Goncalves, I.; González-Romero, E.; Goverdovski, A.; Gramegna, F.; Heil, M.; Griesmayer, E.; Guerrero, C.; Gunsing, F.; Haas, B.; Kadi, Y.; Herrera-Martínez, A.; Igashira, M.; Isaev, S.; Kappeler, F.; Karamanis, D.; Karadimos, D.; Kerveno, M.; Mastinu, P.; Ketlerov, V.; Koehler, P.; Konovalov, V.; Kossionides, E.; Mosconi, M.; Krticka, M.; Lamboudis, C.; Leeb, H.; Lindote, A.; Lopes, I.; Neves, F.; Lozano, M.; Lukic, S.; Marganiec, J.; Marrone, S.; Mengoni, A.; Milazzo, P. M.; Moreau, C.; Oberhummer, H.; Oshima, M.; O'Brien, S.; Pancin, J.; Papachristodoulou, C.; Rauscher, T.; Papadopoulos, C.; Paradela, C.; Patronis, N.; Rudolf, G.; Pavlik, A.; Pavlopoulos, P.; Perrot, L.; Plag, R.; Plompen, A.; Plukis, A.; Rullhusen, P.; Poch, A.; Pretel, C.; Quesada, J.; n_TOF Collaboration; Reifarth, R.; Rosetti, M.; Rubbia, C.; Salgado, J.; Sarchiapone, L.; Savvidis, I.; Stephan, C.; Tagliente, G.; Walter, S.; Taín, José Luis ; Tassan-Got, L.; Tavora, L.; Becvar, F.; Terlizzi, R.; Vannini, G.; Vaz, P.; Ventura, A.; Villamarin, D.; Vincente, M. C.; Berthoumieux, E.; Vlachoudis, V.; Vlastou, R.; Voss, F.; Wendler, H.; Wiescher, M.; Wisshak, K.; Bisterzo, S.; Calvino, F.; Cano Ott, Daniel; Capote, R.; Carrapico, C.; Eleftheriadis, C.; Cennini, P.; Chepel, V.; Chiaveri, E.; Colonna, N.; Cortés Rossell, Guillem; Couture, A.; Cox, J.
Keywords:	Galactic chemical evolution Giant Branch Stars R-process Nucleosynthesis Abundances Elements [PACS] Nucleon radiative capture [PACS] Properties of nuclei with 190 ≤ A ≤ 219 [PACS] Stellar structure, interiors, evolution, nucleosynthesis, ages
Issue Date:	19-Jan-2007
Publisher:	American Physical Society
Citation:	Physical Review C 75(1): 015806 (2007)
Abstract:	The neutron capture cross section of Pb-204 has been measured at the CERN n_TOF installation with high resolution in the energy range from 1 eV to 440 keV. An R-matrix analysis of the resolved resonance region, between 1 eV and 100 keV, was carried out using the SAMMY code. In the interval between 100 keV and 440 keV we report the average capture cross section. The background in the entire neutron energy range was reliably determined from the measurement of a Pb-208 sample. Other systematic effects in this measurement were investigated and precisely corrected by means of detailed Monte Carlo simulations. We obtain a Maxwellian average capture cross section for Pb-204 at kT=30 keV of 79(3) mb, in agreement with previous experiments. However our cross section at kT=5 keV is about 35% larger than the values reported so far. The implications of the new cross section for the s-process abundance contributions in the Pb/Bi region are discussed.
Description:	9 pages, 3 figures.-- PACS nrs.: 25.40.Lw; 27.80.+w; 97.10.Cv.-- ISI Article Identifier: 000243896000061.-- ArXiv pre-print available at: http://arxiv.org/abs/nucl-ex/0610033
Publisher version (URL):	http://dx.doi.org/10.1103/PhysRevC.75.015806
URI:	http://hdl.handle.net/10261/9135
DOI:	10.1103/PhysRevC.75.015806
ISSN:	0556-2813
Appears in Collections:	(IFIC) Artículos

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