The fission experimental programme at the CERN n_TOF facility: status and perspectives
The fission experimental programme at the CERN n_TOF facility: status and perspectives
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DOI：
10.1140/epja/s10050-020-00037-8
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
N. Colonna;A. Tsinganis;R. Vlastou;N. Patronis;M. Diakaki;S. Amaducci;M. Barbagallo;S. Bennett;E. Berthoumieux;M. Bacak;G. Cosentino;S. Cristallo;P. Finocchiaro;J. Heyse;D. Lewis;A. Manna;C. Massimi;E. Mendoza;M. Mirea;A. Moens;R. Nolte;E. Pirovano;M. Sabate-Gilarte;G. Sibbens;A. Smith;N. Sosnin;A. Stamatopoulos;D. Tarrío;L. Tassan-got;D. Vanleeuw;A. Ventura;D. Vescovi;T. Wright;P. Žugec;The nTOF Collaboration
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文献类型：
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作者：
N. Colonna;A. Tsinganis;R. Vlastou;N. Patronis;M. Diakaki;S. Amaducci;M. Barbagallo;S. Bennett;E. Berthoumieux;M. Bacak;G. Cosentino;S. Cristallo;P. Finocchiaro;J. Heyse;D. Lewis;A. Manna;C. Massimi;E. Mendoza;M. Mirea;A. Moens;R. Nolte;E. Pirovano;M. Sabate-Gilarte;G. Sibbens;A. Smith;N. Sosnin;A. Stamatopoulos;D. Tarrío;L. Tassan-got;D. Vanleeuw;A. Ventura;D. Vescovi;T. Wright;P. Žugec;The nTOF Collaboration
中子诱发裂变反应在基础核科学和应用核科学的各个领域中起着至关重要的作用。在基础核物理学中，它们提供了关于核物质性质的重要信息，而在核技术中，它们是目前和未来反应堆设计的基础。最后，由于中子星星合并的多信使观测和裂变再循环在核合成过程中的重要作用，裂变反应在核天体物理中重新引起了人们的兴趣。虽然研究了几十年，许多基本问题仍然存在于裂变反应，而现代应用和更可靠的核模型的发展需要高精度和一致的裂变截面和其他裂变观测数据的实验数据。为了满足这些需要，在过去18年中，利用中子束的高能量分辨率、高亮度和宽能量范围以及为此目的设计的探测和数据采集系统，在欧洲核子研究组织的n TOF中子飞行时间设施开展了广泛的裂变研究方案。虽然在185米长的飞行路径上研究了长寿命同位素，但最近在约19米处建造的第二个实验区为挑战短寿命锕系元素的测量开辟了道路。本文介绍了中子诱发裂变反应的n_TOF实验计划的概况，沿着介绍了该实验装置的主要特点、所采用的各种探测系统和数据分析技术。最重要的几个主要和次要的锕系元素迄今为止获得的结果和裂变测量的未来前景在n_TOF的介绍和讨论。
Neutron-induced fission reactions play a crucial role in a variety of fields of fundamental and applied nuclear science. In basic nuclear physics they provide important information on properties of nuclear matter, while in nuclear technology they are at the basis of present and future reactor designs. Finally, there is a renewed interest in fission reactions in nuclear astrophysics due to the multi-messenger observation of neutron star mergers and the important role played by fission recycling inr-process nucleosynthesis. Although studied for several decades, many fundamental questions still remain on fission reactions, while modern applications and the development of more reliable nuclear models require high-accuracy and consistent experimental data on fission cross sections and other fission observables. To address these needs, an extensive fission research programme has been carried out at the n_TOF neutron time-of-flight facility at CERN during the last 18 years, taking advantage of the high energy resolution, high luminosity and wide energy range of the neutron beam, as well as of the detection and data acquisition systems designed for this purpose. While long-lived isotopes are studied on the 185 m long flight-path, the recent construction of a second experimental area at a distance of about 19 m has opened the way to challenging measurements of short-lived actinides. This article provides an overview of the n_TOF experimental programme on neutron-induced fission reactions along with the main characteristics of the facility, the various detection systems and data analysis techniques used. The most important results on several major and minor actinides obtained so far and the future perspectives of fission measurements at n_TOF are presented and discussed.