Measurement of the Pu(n,f) cross-section at the CERN n_TOF facility; First results from experimental area II (EAR-2)

Stamatopoulos, A.*; Tsinganis, A.*; Colonna, N.*; 原田 秀郎; 木村 敦; n_TOF Collaboration*; 他126名*

EPJ Web of Conferences, 146, p.04030_1 - 04030_4, 2017/09

https://doi.org/10.1051/epjconf/201714604030

The accurate knowledge of the neutron-induced fission cross-sections of actinides and other isotopes involved in the nuclear fuel cycle is essential for the design of advanced nuclear systems, such as Generation-IV nuclear reactors. Such experimental data can also provide the necessary feedback for the adjustment of nuclear model parameters used in the evaluation process, resulting in the further development of nuclear fission models. In the present work, the Pu(n,f) cross-section was measured at CERN n_TOF facility relative to the well-known U(n,f) cross section, over a wide range of neutron energies, from meV to almost MeV, using the time-of-flight technique and a set-up based on Micromegas detectors. This measurement was the first experiment to be performed at n_TOF new experimental area (EAR-2), which offers a significantly higher neutron flux compared to the already existing experimental area (EAR-1).Preliminary results as well as the experimental procedure, including a description of the facility and the data handling and analysis, are presented.

Fe、Pu、Pu及びU共鳴パラメータの誤差の推定

中川 庸雄; 柴田 恵一

JAERI-Research 97-035, 79 Pages, 1997/05

JAERI-Research-97-035.pdf:3.57MB

JENDL-3.2に格納されているFe,Pu,Pu及びUの誤差について検討した。評価のもとになった実験データを調査し、できるだけそれらに忠実に誤差を与えた。結果は、ENDFフォーマットのMF32の形式で整理した。本レポートには結果を表の形で示す。