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 and Wisshak, K. (2006) Measurement of La-139(n, gamma) cross section. American Institute of Physics (AIP).
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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.
Item Type Other
Uncontrolled Keywords CAPTURE; s process; La-139; SYSTEM; level density; FACILITY; N-TOF; neutron capture; neutron strength function; CERN
Date Deposited 14 Nov 2024 10:49
Last Modified 14 Nov 2024 10:49

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