欧洲核子研究中心n＿TOF装置EAR2中\(^{246}\) Cm和\(^{248}\) Cm中子捕获截面的测量和分析

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, NUCLEAR The European Physical Journal A Pub Date : 2024-12-10 DOI:10.1140/epja/s10050-024-01453-w
V. Alcayne, A. Kimura, E. Mendoza, D. Cano-Ott, T. Martínez, O. Aberle, F. Álvarez-Velarde, J. Andrzejewski, L. Audouin, V. Bécares, M. Bacak, M. Barbagallo, F. Bečvář, G. Bellia, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Busso, M. Caamaño, L. Caballero-Ontanaya, F. Calviño, M. Calviani, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, L. Cosentino, S. Cristallo, L. A. Damone, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, Z. Eleme, B. Fernández-Domínguez, A. Ferrari, P. Finocchiaro, V. Furman, K. Göbel, A. Gawlik, S. Gilardoni, T. Glodariu, I. F. Gonçalves, E. González-Romero, C. Guerrero, F. Gunsing, H. Harada, S. Heinitz, J. Heyse, D. G. Jenkins, F. Käppeler, Y. Kadi, T. Katabuchi, N. Kivel, I. Knapova, M. Kokkoris, Y. Kopatch, M. Krtička, D. Kurtulgil, I. Ladarescu, C. Lederer-Woods, J. Lerendegui-Marco, S. Lo Meo, S. J. Lonsdale, D. Macina, A. Manna, A. Masi, C. Massimi, P. Mastinu, M. Mastromarco, F. Matteucci, E. A. Maugeri, A. Mazzone, A. Mengoni, V. Michalopoulou, P. M. Milazzo, F. Mingrone, A. Musumarra, A. Negret, R. Nolte, F. Ogállar, A. Oprea, N. Patronis, A. Pavlik, A. Pérez de Rada, J. Perkowski, L. Persanti, I. Porras, J. Praena, J. M. Quesada, D. Radeck, D. Ramos-Doval, T. Rauscher, R. Reifarth, D. Rochman, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, S. Simone, A. G. Smith, N. V. Sosnin, A. Stamatopoulos, G. Tagliente, J. L. Tain, T. Talip, A. Tarifeño-Saldivia, L. Tassan-Got, A. Tsinganis, J. Ulrich, S. Urlass, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, D. Vescovi, V. Vlachoudis, R. Vlastou, A. Wallner, P. J. Woods, T. Wright, P. Žugec
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引用次数: 0

摘要

在欧洲核子研究中心n＿TOF设施的第二实验区（EAR2）上，用三个C \(_6\) D \(_6\)探测器测量了\(^{246}\) Cm（n, \(\gamma \)）和\(^{248}\) Cm（n, \(\gamma \)）截面。这项测量是集体努力的一部分，目的是改善微量锕系元素（MAs）的捕获截面数据，这些数据是估计轻水反应堆和创新反应堆系统中这些同位素的产生和嬗变速率所必需的。特别是，\(^{246}\) Cm和\(^{248}\) Cm中的中子捕获为其他Cm同位素和Bk、Cf等较重元素的形成开辟了路径，这些Cm同位素（n, \(\gamma \)）截面的知识在乏核燃料的输运、嬗变和储存中起着重要作用。反应\(^{246}\) Cm（n, \(\gamma \)）和\(^{248}\) Cm（n, \(\gamma \)）是在n＿TOF EAR2上分析的两个首次捕获测量。在这次实验和最近在J-PARC进行的两次测量之前，只有一组\(^{246}\) Cm和\(^{248}\) Cm的捕获截面数据，这是1969年在地下核爆炸实验中获得的。在n＿TOF的测量中，共识别并拟合了13个\(^{246}\) Cm在4 ～ 400 eV之间的共振和5个\(^{248}\) Cm在7 ～ 100 eV之间的共振。得到的\(^{246}\) Cm辐射核与JENDL-5兼容，但部分不与JENDL-4兼容，JENDL-4已被JEFF-3.3和ENDF/B-VIII.0采用。前三个\(^{248}\) Cm共振得到的辐射核与JENDL-5兼容，而另外两个与其他任何评价都不兼容，分别为20和60% larger than JENDL-5.
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Measurement and analysis of the \(^{246}\)Cm and \(^{248}\)Cm neutron capture cross-sections at the EAR2 of the n_TOF facility at CERN

The \(^{246}\)Cm(n,\(\gamma \)) and \(^{248}\)Cm(n,\(\gamma \)) cross-sections have been measured at the Experimental Area 2 (EAR2) of the n_TOF facility at CERN with three C\(_6\)D\(_6\) detectors. This measurement is part of a collective effort to improve the capture cross-section data for Minor Actinides (MAs), which are required to estimate the production and transmutation rates of these isotopes in light water reactors and innovative reactor systems. In particular, the neutron capture in \(^{246}\)Cm and \(^{248}\)Cm open the path for the formation of other Cm isotopes and heavier elements such as Bk and Cf and the knowledge of (n,\(\gamma \)) cross-sections of these Cm isotopes plays an important role in the transport, transmutation and storage of the spent nuclear fuel. The reactions \(^{246}\)Cm(n,\(\gamma \)) and \(^{248}\)Cm(n,\(\gamma \)) have been the two first capture measurements analyzed at n_TOF EAR2. Until this experiment and two recent measurements performed at J-PARC, there was only one set of data of the capture cross-sections of \(^{246}\)Cm and \(^{248}\)Cm, that was obtained in 1969 in an underground nuclear explosion experiment. In the measurement at n_TOF a total of 13 resonances of \(^{246}\)Cm between 4 and 400 eV and 5 of \(^{248}\)Cm between 7 and 100 eV have been identified and fitted. The radiative kernels obtained for \(^{246}\)Cm are compatible with JENDL-5, but some of them are not with JENDL-4, which has been adopted by JEFF-3.3 and ENDF/B-VIII.0. The radiative kernels obtained for the first three \(^{248}\)Cm resonances are compatible with JENDL-5, however, the other two are not compatible with any other evaluation and are 20 and 60% larger than JENDL-5.

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来源期刊
The European Physical Journal A
The European Physical Journal A 物理-物理：核物理
CiteScore
5.00
自引率
18.50%
发文量
216
审稿时长
3-8 weeks
期刊介绍： Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.
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