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首页> 外文期刊>EPJ Web of Conferences >Application of Calorimetric Low-Temperature Detectors for the Investigation of Z-Yield Distributions of Fission Fragments
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Application of Calorimetric Low-Temperature Detectors for the Investigation of Z-Yield Distributions of Fission Fragments

机译：量热式低温探测器在研究裂变碎片Z-Yield分布中的应用

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In recent experiments, the new concept of calorimetric low-temperature detectors (CLTDs) was applied for the first time for the investigation of isotopic yields of fission fragments. Fragments from neutron-induced fission sources were mass-separated by the LOHENGRIN spectrometer at the ILL Grenoble and, after passing silicon nitride membranes used as degraders, detected in a CLTD array. The new detector concept of a thermal detector provides a fundamental advantage over conventional ionization-mediated detectors, in particular for heavier particle masses at low energies. Using fissile targets of~(235)U,~(239)Pu and~(241)Pu, nuclear-charge separation was studied in the mass region 82 ≤ A ≤ 139. For light fragments, the Z resolution matches historically best values with conventional techniques, while for heavier masses substantial improvement was attained. We have gained first LOHENGRIN data on the isotopic yields in the light-mass group of~(241)Pu. Towards mass-symmetry, known Z-yield data were supplemented in the range A = 110 to 113 for~(241)Pu and~(239)Pu. Extended data sets were cumulated for A = 92 and 96 due to a recent request from studies on the reactor anti-neutrino spectrum. Furthermore, considerable progress was achieved to extend isotopic yield measurements up to the heavy-mass region, hardly accessible until now.
机译：在最近的实验中，量热低温探测器（CLTDs）的新概念首次用于研究裂变碎片的同位素产率。中子诱发裂变源的碎片在ILL格勒诺布尔的LOHENGRIN光谱仪中进行了质量分离，并在用作降解剂的氮化硅膜通过后，在CLTD阵列中进行了检测。热检测器的新检测器概念相对于传统的电离介导的检测器具有根本的优势，特别是对于低能量下较重的粒子质量而言。使用〜（235）U，〜（239）Pu和〜（241）Pu的裂变目标，研究了质量区82≤A≤139中的核电荷分离。对于轻碎片，Z分辨率与传统技术，而对于更重的质量，则实现了实质性的改进。我们已经获得了〜（241）Pu轻质量组中同位素产量的首个LOHENGRIN数据。对于质量对称性，〜（241）Pu和〜（239）Pu在A = 110到113的范围内补充了已知的Z屈服数据。由于最近对反应堆抗中微子谱研究的要求，累积了A = 92和96的扩展数据集。此外，在将同位素产率测量范围扩展到目前尚难获得的重质量区域方面取得了可观的进展。

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