検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

New measurement of neutron capture resonances in $$^{209}$$Bi

$$^{209}$$Biの中性子捕獲共鳴の新たな測定

Domingo-Pardo, C.*; Abbondanno, U.*; Aerts, G.*; $'A$lvarez, H.*; Alvarez-Velarde, F.*; Andriamonje, S.*; Andrzejewski, J.*; Assimakopoulos, P.*; Audouin, L.*; Badurek, G.*; Baumann, P.*; Be$v{c}$v$'a$$v{r}$, F.*; Berthoumieux, E.*; Calvi$~n$o, F.*; Cano-Ott, D.*; Capote, R.*; Carrillo de Albornoz, A.*; Cennini, P.*; Chepel, V.*; Chiaveri, E.*; Colonna, N.*; Cortes, G.*; Couture, A.*; Cox, J.*; Dahlfors, M.*; David, S.*; Dillman, I.*; Dolfini, R.*; Dridi, W.*; Dur$'a$n, I.*; Eleftheriadis, C.*; Embid-Segura, M.*; Ferrant, L.*; Ferrari, A.*; Ferreira-Marques, R.*; Fitzpatrick, L.*; Frais-Koelbl, H.*; 藤井 香織*; Furman, W.*; Gallino, R.*; Goncalves, I.*; Gonzalez-Romero, E.*; Goverdovski, A.*; Gramegna, F.*; Griesmayer, E.*; Guerrero, C.*; Gunsing, F.*; Haas, B.*; Haight, R.*; Heil, M.*; Herrera-Martinez, A.*; 井頭 政之*; Isaev, S.*; Jericha, E.*; Kadi, Y.*; K$"a$ppeler, F.*; Karamanis, D.*; Karadimos, D.*; Kerveno, M.*; Ketlerov, V.*; Koehler, P.*; Konovalov, V.*; Kossionides, E.*; Krti$v{c}$ka, M.*; Lamboudis, C.*; Leeb, H.*; Lindote, A.*; Lopes, I.*; 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.*; 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.*; $'A$lvarez, H.*; Alvarez-Velarde, F.*; Andriamonje, S.*; Andrzejewski, J.*; Assimakopoulos, P.*; Audouin, L.*; Badurek, G.*; Baumann, P.*; Be$v{c}$v$'a$$v{r}$, F.*; Berthoumieux, E.*; Calvi$~n$o, F.*; Cano-Ott, D.*; Capote, R.*; Carrillo de Albornoz, A.*; Cennini, P.*; Chepel, V.*; Chiaveri, E.*; Colonna, N.*; Cortes, G.*; Couture, A.*; Cox, J.*; Dahlfors, M.*; David, S.*; Dillman, I.*; Dolfini, R.*; Dridi, W.*; Dur$'a$n, I.*; Eleftheriadis, C.*; Embid-Segura, M.*; Ferrant, L.*; Ferrari, A.*; Ferreira-Marques, R.*; Fitzpatrick, L.*; Frais-Koelbl, H.*; Fujii, Kaori*; Furman, W.*; Gallino, R.*; Goncalves, I.*; Gonzalez-Romero, E.*; Goverdovski, A.*; Gramegna, F.*; Griesmayer, E.*; Guerrero, C.*; Gunsing, F.*; Haas, B.*; Haight, R.*; Heil, M.*; Herrera-Martinez, A.*; Igashira, Masayuki*; Isaev, S.*; Jericha, E.*; Kadi, Y.*; K$"a$ppeler, F.*; Karamanis, D.*; Karadimos, D.*; Kerveno, M.*; Ketlerov, V.*; Koehler, P.*; Konovalov, V.*; Kossionides, E.*; Krti$v{c}$ka, M.*; Lamboudis, C.*; Leeb, H.*; Lindote, A.*; Lopes, I.*; 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.*; 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.*

$$^{209}$$Biの中性子捕獲断面積を、欧州共同素粒子原子核研究機関CERNの中性子飛行時間実験施設n_TOF施設において、パルスハイトウェイティング法で測定した。検出器を最適配置して、中性子バックグラウンドを減らすことができた。$$^{209}$$Biは宇宙での元素合成における最後の安定元素であるため、Maxwell平均中性子断面積は$$alpha$$崩壊による反応フローの元素合成循環過程を調べるうえで重要である。$$kT$$=5から8keVの間の熱エネルギー領域における捕獲反応率は現在元素計算に用いられている値より、約16%高いことがわかった。得られた断面積データは鉛ビスマス液体金属ターゲットを用いる加速器駆動核変換システムの核設計にも有用である。

The neutron capture cross section of $$^{209}$$Bi has been measured at the CERN n_TOF facility by employing the pulse-height-weighting technique. Improvements over previous measurements are mainly because of an optimized detection system, which led to a practically negligible neutron sensitivity. Because $$^{209}$$Bi is the last stable isotope in the reaction path of the stellar s-process, the Maxwellian averaged capture cross section is important for the recycling of the reaction flow by alpha decays. In the relevant stellar range of thermal energies between $$kT$$ = 5 and 8 keV our new capture rate is about 16% higher than the presently accepted value used for nucleosynthesis calculations. The present cross section measurement is also of relevance for the design of accelerator driven systems based on a liquid metal Pb/Bi spallation target.

Access

:

- Accesses

InCites™

:

パーセンタイル:13.18

分野:Physics, Nuclear

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.