The 236U neutron capture cross-section measured at the n-TOF CERN facility
The 236U neutron capture cross-section measured at the n-TOF CERN facility
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在 n-TOF CERN 设施测量的 236U 中子俘获截面
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
A. Pavlik
中科院分区：
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作者：
M. Mastromarco;A. Wallner;T. Katabuchi;C. Lederer;C. Eleftheriadis;H. Leeb;G. Giubrone;C. Weiss;Vlachoudis;R. Losito;F. Käppeler;M. Chin;S. Heinitz;M. Krticka;C. Carrapiço;L. Audouin;A. Mengoni;Alejandro Garcia;S. Altstadt;Khryachkov;T. Heftrich;T. Rauscher;Ketlerov;F. Calviño;R. Vlastou;E. Berthoumieux;M. Cortés;M. Licata;S. Schmidt;F. Becvár;J. Quesada;P. Žugec;E. Jericha;A. Ferrari;I. Durán;D. Karadimos;E. Mendoza;S. Ganesan;A. Tarifeño;M. Barbagallo;L. S. Leong;A. Plompen;P. Sedyshev;D. Jenkins;N. Colonna;C. Domingo;G. Cortés;I. Gonçalves;P. Vaz;E. Griesmayer;M. Diakaki;F. Cerutti;D. Tarrío;C. Lampoudis;M. Sabate;M. Calviani;A. Riego;T. Martinez;J. Billowes;E. Leal;P. Milazzo;A. Tsinganis;P. Gurusamy;G. Vannini;M. B. Gómez;J. Lerendegui;J. Andrzejewski;D. Bosnar;T. Ware;J. Tain;A. Manousos;J. Heyse;F. Gunsing;W. Mondelaers;Y. Kadi;Markus Brugger;A. Saxena;R. Sarmento;R. Reifarth;A. Ventura;M. Kokkoris;D. Schumann;E. González;M. Mirea;C. Rubbia;S. Valenta;M. Vermeulen;J. Perkowski;M. Weigand;E. Chiaveri;A. Hernández;R. Versaci;M. Robles;C. Guerrero;C. Langer;J. Praena;Variale;Furman;N. Dzysiuk;F. Roman;K. Fraval;C. Paradela;J. Ryan;L. Tassan;D. Cano;T. Wright;F. Mingrone;C. Massimi;P. Mastinu;G. Tagliente;A. Goverdovski;P. Koehler;Bécares;J. Kroll;P. Schillebeeckx;J. Marganiec;F. Belloni;A. Pavlik
236U 同位素在未来和当前运行的核系统中发挥着重要作用。该同位素捕获反应的实际知识在热区域中是令人满意的，但对于快堆和 ADS 应用来说被认为是不够的。因此，首次在从热能到 1MeV 的整个能量区域测量了 236U(n, gamma ) 反应截面
在 n TOF 设施中，有两种不同的检测系统：采用总能量沉积方法的 C6D6 检测器阵列，以及由 40 个 BaF2 晶体制成的 4p 总吸收量热计 (TAC)。两个 n TOF 数据集在解析共振区域高达 800 eV 的统计不确定性范围内彼此一致，但相对于当前评估的数据库存在相当大的差异（高达 20%）。
此外，在 n TOF 数据中发现了两个新的共振。在高达 200 keV 的未解析共振区域中，n TOF 结果显示与之前的测量和评估数据相当一致。
The 236U isotope plays an important role in nuclear systems, both for future and currently operating ones. The actual knowledge of the capture reaction of this isotope is satisfactory in the thermal region, but it is considered insufficient for Fast Reactor and ADS applications. For this reason the 236U(n, gamma ) reaction cross section has been measured for the first time in the whole energy region from thermal energy up to 1MeV
at the n TOF facility with two different detection systems: an array of C6D6 detectors, employing the total energy deposited method, and a 4p total absorption calorimeter (TAC), made of 40 BaF2 crystals. The two n TOF data sets agree with each other within the statistical uncertainty in the Resolved Resonance Region up to 800 eV, while sizable differences (up to 20%) are found relative to the current evaluated data libraries.
Moreover two new resonances have been found in the n TOF data. In the Unresolved Resonance Region up to 200 keV, the n TOF results show a reasonable agreement with previous measurements and evaluated data.