Indirect measurements of neutron cross-secti at heavy-ion storage rings
Indirect measurements of neutron cross-secti at heavy-ion storage rings
复制标题
重离子存储环中子截面的间接测量
DOI：
10.1088/1742-6596/1668/1/012019
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
I. Tsekhanovich
中科院分区：
文献类型：
--
作者：
A. Henriques;B. Jurado;M. Grieser;D. Denis;T. Chiron;L. Gaudefroy;J. Glorius;C. Langer;Y. Litvinov;L. Mathieu;V. Méot;R. Pérez;J. Pibernat;R. Reifarth;O. Roig;B. Thomas;B. Thomas;J. Thomas;I. Tsekhanovich
短寿命原子核的中子反应截面是核天体物理学的基础，因为恒星中的这些反应是宇宙中大多数重元素产生的原因。这些反应在能源生产和医学等应用领域也很关键。然而，由于所涉及的目标的放射性，中子感生截面测量可能极具挑战性，甚至不可能进行。通过替代反应法进行间接测量有助于克服这些困难。替代反应方法依赖于使用替代反应，该替代反应将导致与感兴趣的中子诱导反应中相同的激发核的形成。通过替代反应产生的核的衰变概率（裂变、中子和伽马射线发射）允许人们约束模型和所需中子横截面的预测。我们建议在重离子储存环的逆运动学中进行替代反应测量，特别是在GSI/FAIR设施的ESR环中。我们提出了最有前途的设置，同时测量裂变，中子和伽马射线的发射概率的第一次的概念性想法。考虑到238 U（d，d '）反应的第一次模拟的结果显示，以及新的技术发展，正在朝着这个设置。
Cross sections for neutron-induced reactions of short-lived nuclei are essential for nuclear astrophysics since these reactions in the stars are responsible for the production of most heavy elements in the universe. These reactions are also key in applied domains like energy production and medicine. Nevertheless, neutron-induced cross-section measurements can be extremely challenging or even impossible to perform due to the radioactivity of the targets involved. Indirect measurements through the surrogate-reaction method can help to overcome these difficulties. The surrogate-reaction method relies on the use of an alternative reaction that will lead to the formation of the same excited nucleus as in the neutron-induced reaction of interest. The decay probabilities (for fission, neutron and gamma-ray emission) of the nucleus produced via the surrogate reaction allow one to constrain models and the prediction of the desired neutron cross sections. We propose to perform surrogate reaction measurements in inverse kinematics at heavy-ion storage rings, in particular at the CRYRING@ESR of the GSI/FAIR facility. We present the conceptual idea of the most promising setup to measure for the first time simultaneously the fission, neutron and gamma-ray emission probabilities. The results of the first simulations considering the 238U(d,d’) reaction are shown, as well as new technical developments that are being carried out towards this set-up.
DOI：
10.1016/j.nimb.2013.07.025
发表时间：
2013-12
影响因子：
1.3
作者：
Y. Litvinov;S. Bishop;K. Blaum;F. Bosch;C. Brandau;L. Chen;I. Dillmann;P. Egelhof;H. Geissel-H.-Geis
通讯作者：
Y. Litvinov;S. Bishop;K. Blaum;F. Bosch;C. Brandau;L. Chen;I. Dillmann;P. Egelhof;H. Geissel-H.-Geis