Measurement of La-139(n, gamma) cross section

Terlizzi, R.; Abbondanno, U.; Acrts, G.; Alvarez, H.; Alvarcz-Vclardc, F.; Andriamonjc, S.; Andrzcjcwski, J.; Assimakopoulos, P.; Audouin, L.; Badurek, G.; Baumann, P.; Becvar, F.; Berthoumieux, E.; Calvino, F.; Cano-Ott, D.; Capote, R.; Albornoz, A.C.; Cennini, P.; Chepel, V.; Chiaveri, E.; Colonna, N.; Cortes, G.; Couture, A.; Cox, J.; Dahlfors, M.; David, S.; Dolfini, R.; Domingo-Pardo, C.; Dridi, W.; Duran, R.B.; Eleftheriadis, C.; Embid-Segura, M.; Ferrant, L.; Ferrari, A.; Ferreira-Marques, R.; Fitzpatrick, L.; Frais-Koclbl, H.; Fujii, K.; Furman, W.; Gallino, R.; Gonzalez-Romero, E.; Goverdovski, A.; Gramegna, F.; Griesmayer, E.; Guerrero, C.; Gunsing, F.; Haas, B.; Haight, R.; Heil, M.; Herrera-Martinez, A.; Lgashira, M.; Isaev, S.; Jericha, E.; Kadi, Y.; Kappeler, F.; Karamanis, D.; Karadimos, D.; Kerveno, M.; Ketlerov, V.; Kochler, P.; Kossionides, E.; Krticka, M.; Lamboudis, C.; Leeb, H.; Lindote, A.; Lozano, M.; Lukic, S.; Marganiec, J.; Marques, L.; Marrone, S.; Mastinu, P.; Mengoni, A.; Milazzo, P.M.; Moreau, C.; Mosconi, M.; Neves, F.; Oberhummer, H.; O'Brien, S.; Oshima, M.; 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.; Stephan, C.; Tagliente, G.; Tain, J. L.; Tassan-Got, L.; Tavora, L.; Vannini, G.; Vaz, P.; Ventura, A.; Villamarin, D.; Vincente, M. C.; Vlachoudis, V.; Vlastou, R.; Voss, F.; Walter, S.; Wendler, H.; Wiescher, Michael; Wisshak, K.

Author

Terlizzi, R.

Abbondanno, U.

Acrts, G.

Alvarez, H.

Alvarcz-Vclardc, F.

Andriamonjc, S.

Andrzcjcwski, J.

Assimakopoulos, P.

Audouin, L.

Badurek, G.

Baumann, P.

Becvar, F.

Berthoumieux, E.

Calvino, F.

Cano-Ott, D.

Capote, R.

Albornoz, A.C.

Cennini, P.

Chepel, V.

Chiaveri, E.

Colonna, N.

Cortes, G.

Couture, A.

Cox, J.

Dahlfors, M.

David, S.

Dolfini, R.

Domingo-Pardo, C.

Dridi, W.

Duran, R.B.

Eleftheriadis, C.

Embid-Segura, M.

Ferrant, L.

Ferrari, A.

Ferreira-Marques, R.

Fitzpatrick, L.

Frais-Koclbl, H.

Fujii, K.

Furman, W.

Gallino, R.

Gonzalez-Romero, E.

Goverdovski, A.

Gramegna, F.

Griesmayer, E.

Guerrero, C.

Gunsing, F.

Haas, B.

Haight, R.

Heil, M.

Herrera-Martinez, A.

Lgashira, M.

Isaev, S.

Jericha, E.

Kadi, Y.

Kappeler, F.

Karamanis, D.

Karadimos, D.

Kerveno, M.

Ketlerov, V.

Kochler, P.

Kossionides, E.

Krticka, M.

Lamboudis, C.

Leeb, H.

Lindote, A.

Lozano, M.

Lukic, S.

Marganiec, J.

Marques, L.

Marrone, S.

Mastinu, P.

Mengoni, A.

Milazzo, P.M.

Moreau, C.

Mosconi, M.

Neves, F.

Oberhummer, H.

O'Brien, S.

Oshima, M.

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.

Stephan, C.

Tagliente, G.

Tain, J. L.

Tassan-Got, L.

Tavora, L.

Vannini, G.

Vaz, P.

Ventura, A.

Villamarin, D.

Vincente, M. C.

Vlachoudis, V.

Vlastou, R.

Voss, F.

Walter, S.

Wendler, H.

Wiescher, Michael

Wisshak, K.

Abstract

We measured the neutron capture cross section of La-139 relative to Au-197 in the energy range of 0.6 cV to 9 keV at n_TOF, the neutron time-of-flight facility at CERN. After a description of the experimental apparatus, we discuss data analysis procedures. The data were fitted using R-matrix formalism to extract resonance parameters which, in turn, were used to calculate average level spacings D-0 = 268 +/- 22 eV and D-1 <250 cV, and neutron strength functions S-0 = (0.79 +/- 0.03)x 10(-4) and S-1 = (0.73 +/- 0.05)x 10(4) for s- and p-wave resonances. The data also were used to determine Maxwellian-averaged neutron capture cross sections which, in turn, were used to calculate the La-139 abundance synthesized in a stellar model of the main component of the s process.