Resonance capture cross section of Pb

Pbの共鳴捕獲断面積

Domingo-Pardo, C.*; Abbondanno, U.*; Aerts, G.*; lvarez, H.*; Alvarez-Velarde, F.*; Andriamonje, S.*; Andrzejewski, J.*; Assimakopoulos, P.*; Audouin, L.*; Badurek, G.*; Baumann, P.*; Becvr, F.*; Berthoumieux, E.*; Bisterzo, S.*; Calvio, F.*; Cano-Ott, D.*; Capote, R.*; Carrapio, C.*; Cennini, P.*; Chepel, V.*; Chiaveri, E.*; Colonna, N.*; Cortes, G.*; Couture, A.*; Cox, J.*; Dahlfors, M.*; David, S.*; Dillman, I.*; Dolfini, R.*; Dridi, W.*; Durn, I.*; Eleftheriadis, C.*; Embid-Segura, M.*; Ferrant, L.*; Ferrari, A.*; Ferreira-Marques, R.*; Fitzpatrick, L.*; Frais-Koelbl, H.*; 藤井 香織*; Furman, W.*; Gallino, R.*; Goncalves, I.*; Gonzalez-Romero, E.*; Goverdovski, A.*; Gramegna, F.*; Griesmayer, E.*; Guerrero, C.*; Gunsing, F.*; Haas, B.*; Haight, R.*; Heil, M.*; Herrera-Martinez, A.*; 井頭 政之*; Isaev, S.*; Jericha, E.*; Kadi, Y.*; Kppeler, F.*; Karamanis, D.*; Karadimos, D.*; Kerveno, M.*; Ketlerov, V.*; Koehler, P.*; Konovalov, V.*; Kossionides, E.*; Krtika, M.*; Lamboudis, C.*; Leeb, H.*; Lindote, A.*; Lopes, I.*; Lozano, M.*; Lukic, S.*; Marganiec, J.*; Marrone, S.*; Mastinu, P.*; Mengoni, A.*; Milazzo, P. M.*; Moreau, C.*; Mosconi, M.*; Neves, F.*; Oberhummer, H.*; 大島 真澄; O'Brien, S.*; 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.*; 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.*; Wendler, H.*; Wiescher, M.*; Wisshak, K.*

Domingo-Pardo, C.*; Abbondanno, U.*; Aerts, G.*; lvarez, H.*; Alvarez-Velarde, F.*; Andriamonje, S.*; Andrzejewski, J.*; Assimakopoulos, P.*; Audouin, L.*; Badurek, G.*; Baumann, P.*; Becvr, F.*; Berthoumieux, E.*; Bisterzo, S.*; Calvio, F.*; Cano-Ott, D.*; Capote, R.*; Carrapio, C.*; Cennini, P.*; Chepel, V.*; Chiaveri, E.*; Colonna, N.*; Cortes, G.*; Couture, A.*; Cox, J.*; Dahlfors, M.*; David, S.*; Dillman, I.*; Dolfini, R.*; Dridi, W.*; Durn, I.*; Eleftheriadis, C.*; Embid-Segura, M.*; Ferrant, L.*; Ferrari, A.*; Ferreira-Marques, R.*; Fitzpatrick, L.*; Frais-Koelbl, H.*; Fujii, Kaori*; Furman, W.*; Gallino, R.*; Goncalves, I.*; Gonzalez-Romero, E.*; Goverdovski, A.*; Gramegna, F.*; Griesmayer, E.*; Guerrero, C.*; Gunsing, F.*; Haas, B.*; Haight, R.*; Heil, M.*; Herrera-Martinez, A.*; Igashira, Masayuki*; Isaev, S.*; Jericha, E.*; Kadi, Y.*; Kppeler, F.*; Karamanis, D.*; Karadimos, D.*; Kerveno, M.*; Ketlerov, V.*; Koehler, P.*; Konovalov, V.*; Kossionides, E.*; Krtika, M.*; Lamboudis, C.*; Leeb, H.*; Lindote, A.*; Lopes, I.*; Lozano, M.*; Lukic, S.*; Marganiec, J.*; Marrone, S.*; Mastinu, P.*; Mengoni, A.*; Milazzo, P. M.*; Moreau, C.*; Mosconi, M.*; Neves, F.*; Oberhummer, H.*; Oshima, Masumi; O'Brien, S.*; 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.*; 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.*; Wendler, H.*; Wiescher, M.*; Wisshak, K.*

欧州合同素粒子原子核研究機構CERNのn_TOF施設において、Pbの中性子捕獲断面積をパルスハイトウェイティング法で測定した。2台のシンチレーション検出器を最適に配置し、散乱中性子バックグラウンドを無視できるところまで低減することに成功した。3keVから320keVまでの中性子エネルギー領域において、R-matrix解析により、16個の共鳴の共鳴パラメータを決定した。低いエネルギー領域では以前のデータとよく一致したが、45keV以上では相違が見られた。この結果から、s過程がPbの太陽系存在比の778%を占めることがわかった。

The radiative neutron capture cross section of Pb has been measured at the CERN n_TOF facility using the pulse height weighting technique in the resoleved region. The measurement has been performed with an optimized setup of two scintillation detectors, which allowed us to reduce scattered neutron backgrounds down to a negligible level. Resonance parameters have been determined for 16 resonances by means of an R-matrix analysis in the neutron energy range from 3 keV to 320 keV. Good agreement with previous measurements was found at low neutron energies, whereas substantial discrepancies appear beyond 45 keV. With the present results, we obtain an s-process contribution of 778 % to the solar abundance of Pb.