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Pb静間 俊行*; 遠藤 駿典; 木村 敦; Massarczyk, R.*; Schwengner, R.*; Beyer, R.*; Hensel, T.*; Hoffmann, H.*; Junghans, A.*; R
mer, K.*; et al.
Physical Review C, 106(4), p.044326_1 - 044326_11, 2022/10
被引用回数：1 パーセンタイル：22.33(Physics, Nuclear)ドレスデン・ヘルムホルツセンター(HZDR)の制動放射光施設(
ELBE)において、最大運動エネルギー10.5MeV制動放射線を用いて、Pbの電気双極子及び四重極強度分布を核共鳴蛍光法で調べた。その結果、3.6から8.4MeVのエネルギーで136個の共鳴準位を同定した。これらの励起状態のスピンは、入射線に対して90
と127の散乱角度で観測された線の角度分布比から推測されたものである。この実験結果をもとに、自己無撞着エネルギー密度汎関数(EDF)を用いた準粒子・フォノン模型(QPM)による予測との比較により、E1遷移確率について議論した。
Pb for the evaluation of the neutron capture cross section of 
Pb静間 俊行; 岩本 信之; 牧永 あや乃*; Massarczyk, R.*; Schwengner, R.*; Beyer, R.*; Bemmerer, D.*; Dietz, M.*; Junghans, A.*; Kgler, T.*; et al.
Physical Review C, 98(6), p.064317_1 - 064317_12, 2018/12
被引用回数：9 パーセンタイル：59.02(Physics, Nuclear)Pbの双極子強度分布を核共鳴蛍光散乱実験によって調べた。実験はHZDRの線形加速器ELBEにおいて、10.5MeVの電子ビームにより生成された制動放射を使って行われた。その結果、3.7から8.2MeVの励起エネルギーにおいて88本の励起状態を識別した。測定解析で得られた散乱断面積と線崩壊分岐比から光吸収断面積を導出し、既存の(,
)反応断面積と併せて核反応モデルコードCCONEにより光核反応断面積を評価した。これらの評価で得たPbに対する物理情報を基にして、不安定なPbの中性子捕獲断面積を導出した。
Pu in the resonance region at the CERN n_TOF-EAR1 facilityLerendegui-Marco, J.*; Guerrero, C.*; Mendoza, E.*; Quesada, J. M.*; Eberhardt, K.*; Junghans, A. R.*; 木村 敦; n_TOF Collaboration*; 他126名*
Physical Review C, 97(2), p.024605_1 - 024605_21, 2018/02
被引用回数：23 パーセンタイル：84.53(Physics, Nuclear)This paper presents a new time-of-flight capture measurement on Pu carried out at n_TOF-EAR1(CERN), focusing on the analysis and statistical properties of the resonance region, below 4 keV. The Pu(n,)reaction on a sample containing 95(4) mg enriched to 99.959% was measured with an array of four C
D detectors and applying the total energy detection technique. The high neutron energy resolution of n_TOF-EAR1 and the good statistics accumulated have allowed us to extend the resonance analysis up to 4 keV, obtaining new individual and average resonance parameters from a capture cross section featuring a systematic uncertainty of 5%, fulfilling the request of the NEA.
原田 秀郎; 柴田 恵一; 西尾 勝久; 井頭 政之*; Plompen, A.*; Hambsch, F.-J.*; Schillebeeckx, P.*; Gunsing, F.*; Ledoux, X.*; Palmiotti, G.*; et al.
NEA/NSC/WPEC/DOC(2014)446, 111 Pages, 2014/02
This report includes investigations performed by the OECD/NEA/NSC Working Party on International Nuclear Data Evaluation Co-operation (WPEC) Subgroup 31, whose mission was to utilise the collective knowledge of the international nuclear data measurement community to consider the appropriate resources to address and meet the data needs quantified by WPEC Subgroup 26 for Advanced Reactor Systems. The members of Subgroup 31 performed reviews of uncertainty evaluations by evaluators, of state-of-art experimental techniques, of current experimental situations, and summarised an appropriate path to meet the requirements.
Schillebeeckx, P.*; Becker, B.*; Danon, Y.*; Guber, K.*; 原田 秀郎; Heyse, J.*; Junghans, A. R.*; Kopecky, S.*; Massimi, C.*; Moxon, M. C.*; et al.
Nuclear Data Sheets, 113(12), p.3054 - 3100, 2012/12
被引用回数：107 パーセンタイル：97.09(Physics, Nuclear)Uncertainty components of experimental observables resulting from total and reaction cross section experiments are quantified by identifying the metrological parameters involved in the measurement, data reduction and analysis process. In addition, different methods that can be applied to propagate the covariance of the experimental observables to the covariance of the resonance parameters are discussed and compared. It is demonstrated that the final covariance matrix of the resonance parameters not only strongly depends on the type of experimental observables used in the adjustment process, the experimental conditions and the characteristics of the resonance structure, but also on the method that is used to propagate the covariances. In addition, a special data reduction concept and format is presented, which offers the possibility to store the full covariance information of experimental data in the EXFOR library.
Vascon, A.; Wiehl, N.*; Runke, J.*; Drebert, J.*; Reich, T.*; Trautmann, N.*; Cremer, B.*; Kgler, T.*; Beyer, R.*; Junghans, A. R.*; et al.
no journal, ,
In the last years efforts have been undertaken to improve the quality of nuclear targets. Experiments have been performed with lanthanide elements. Plating parameters have been varied and their effects on the material properties of the produced targets have been investigated. The combined use of as smooth as possible substrates and low volatility solvents has turned out to be effective for the production of smooth defect-free layers. The comparison between the performance of these layers and conventional targets has been studied in 
spectroscopy experiments. Improvements in relative detection efficiency of as much as 15% have been achieved. In the symposium, the plating parameters that have a crucial influence on the material properties and performance of nuclear targets will be discussed. Results of the application of the optimized plating procedure to the production of actinide targets will be also shown.
静間 俊行*; 岩本 信之; 牧永 あや乃*; Schwengner, R.*; Beyer, R.*; Bemmerer, D.*; Dietz, M.*; Junghans, A.*; Koegler, T.*; Ludwig, F.*; et al.
no journal, ,
鉛, ビスマス同位体は加速器駆動システム(ADS)においてターゲットとして使用されるため、システムの設計には、鉛、ビスマス同位体の中性子断面積データが必要である。鉛同位体のうち、不安定核Pb-205(半減期1.73
10
年)は、安定核Pb-204の中性子捕獲によって生成され、中性子捕獲によりPb-206となるが、その中性子捕獲断面積はよく分かっていない。本研究では、中性子捕獲断面積の計算で重要となる線強度関数に制限を与えるために、ドイツ・ドレスデン-ロッセンドルフ研究所(HZDR)の制動放射線施設においてPb-206の核共鳴蛍光散乱実験を実施し、エネルギースペクトルを測定した。その結果、励起エネルギーが3.7から8.2MeVの領域において、88本の共鳴準位を観測し、それぞれに対して散乱強度を得た。講演では、実験手法及び解析結果に加えて、得られた散乱強度から求めた線吸収断面積やPb-205の中性子捕獲断面積の評価結果について報告する。
静間 俊行*; 遠藤 駿典; 木村 敦; Schwengner, R.*; Beyer, R.*; Hensel, T.*; Hoffmann, H.*; Junghans, A.*; Romer, T.*; Turkat, S.*; et al.
no journal, ,
ドレスデン・ヘルムホルツセンター(HZDR)の制動放射光施設において、Pb-204の核共鳴蛍光散乱実験を 行った。99.9%濃縮のPb-204ターゲットに最大エネルギー10.5MeVの制動放射光を照射し、ターゲットから放出される共鳴散乱ガンマ線を複数角度に設置されたゲルマニウム検出機で測定した。その結果、励起エネルギー3.6から8.3MeV領域において140の共鳴準位を観測し、ガンマ線ピーク強度から積分散乱断面積を求めた。また散乱ガンマ線の角度強度比から遷移の多重度を決定した。
Vascon, A.; Wiehl, N.*; Runke, J.*; Drebert, J.*; Reich, T.*; Trautmann, N.*; Cremer, B.*; Kgler, T.*; Beyer, R.*; Junghans, A.*; et al.
no journal, ,
TRAKULA is a joint research project of the German Federal Ministry of Science and Education (BMBF) whose main focus is on obtaining high-quality nuclear data relevant to the transmutation of radioactive waste. Fission cross section measurements on actinides, carried out as a part of the TRAKULA project, require well characterized and very homogeneous large-area actinide targets. Molecular plating is one of the most successfully applied techniques for the production of nuclear targets. The element of interest is electrodeposited from an organic medium with quantitative yields. Yet MP-produced targets are usually defective, characterized by surface cracks, and sometimes with poor structural rigidity. Such properties negatively affect the experiments to be performed. In order to produce optimum targets for TRAKULA, in the last years we have undertaken efforts to improve the quality of the obtained layers. The latest results of these studies will be reported, which allowed identifying those plating parameters that have a crucial influence on the homogeneity, structural rigidity, surface roughness, and morphology of the layers. The presentation will also demonstrate that nuclear targets perform differently depending on the properties of the layers. Finally, characterization analyses and preliminary results of the performance of the targets produced for the TRAKULA-related fission experiments will be shown.
