General-purpose nuclear data library JENDL-5 and to the next

岩本 修; 岩本 信之; 国枝 賢; 湊 太志; 中山 梓介; 木村 敦; 中村 詔司; 遠藤 駿典; 長家 康展; 多田 健一; et al.

EPJ Web of Conferences, 284, p.14001_1 - 14001_7, 2023/05

https://doi.org/10.1051/epjconf/202328414001

Japanese Evaluated Nuclear Data Library version 5 (JENDL-5) was released in 2021. JENDL-5 is intended to extend its generality from JENDL-4.0 by covering a wide variety of nuclear data for applications not only to nuclear design and decommissioning, but also to radiation-related fields. Overview of JENDL-5 and a future plan for the next of JENDL-5 are presented. JENDL-5 includes up-to-date neutron reaction cross sections incorporating other various types of data such as newly evaluated nuclear decay, fission yield, and thermal neutron scattering law. The neutron induced reaction cross sections especially on minor actinides in the resonance regions are improved by the experimental data measured at ANNRI. The extensive benchmark analyses on neutron nuclear data were made and the performance of JENDL-5 was confirmed by benchmark tests of ICSBEP and IRPhEP as well as fast reactors, radiation shielding calculations, and so on. So far, several JENDL special-purpose files have been developed for various applications. The data cover neutron, charged particles, and photon induced reactions. As the neutron induced reaction files, two special purpose files of JENDL/AD-2017 and JENDL/ImPACT-2018 were released to meet needs of nuclear backend applications including activation evaluation for nuclear facilities and nuclear transmutations of high-level radioactive wastes of long-lived fission products, respectively. Furthermore, the photon, proton and deuteron data were released as JENDL/PD-2016.1, JENDL-4.0/HE and JENDL/DEU-2020, respectively, for accelerator applications. With updating the data, they were incorporated in JENDL-5 as sub-libraries for facilitation of usability of JENDL. As the next step of JENDL-5, provision of the proper and sufficient covariance will be a major challenge, where cross correlations across different reactions or data-types may play a significant role in connection with data assimilation for various applications.

structure observation of pyroelectric ceramics during power generation cycle

川崎 卓郎; 福田 竜生; 山中 暁*; 坂本 友和*; 村山 一郎*; 加藤 孝典*; 馬場 将亮*; 橋本 英樹*; Harjo, S.; 相澤 一也; et al.

Journal of Applied Physics, 131(13), p.134103_1 - 134103_7, 2022/04

https://doi.org/10.1063/5.0084166

The microscopic origin of the pyroelectric power generation using ferroelectric ceramics for energy harvesting from time-varying waste heat can be understood by conducting neutron diffraction measurements. The behavior of the domain orientation and lattice strain in the lead zirconate titanate (PZT)-based ceramics with a tetragonal structure during the novel power generation cycle combining electric field and temperature change were investigated. The [001] domains and the lattice strain of the (111) plane in the direction of parallel to the electric field increase in the process of simultaneous rise in the electric field and temperature, and rapidly decrease in the process of the field drop. The alignment of the domain orientation by the electric field and its randomization by the higher temperature during the cycle are critical features of the current power generation system.

Status of JENDL

岩本 修; 岩本 信之; 柴田 恵一; 市原 晃; 国枝 賢; 湊 太志; 中山 梓介

EPJ Web of Conferences, 239, p.09002_1 - 09002_6, 2020/09

https://doi.org/10.1051/epjconf/202023909002

Recent progress and future plan of the JENDL project are presented. Two special purpose files were released recently. One is the JENDL Photonuclear Data File 2016 (JENDL/PD-2016) and the other one is the JENDL Activation Cross Section File for Nuclear Decommissioning 2017 (JENDL/AD-2017). Regarding the general-purpose file, we are planning to release a next version of JENDL-4.0 opened in 2010, which would be made available by 2022 as JENDL-5. New data evaluation and revision are in progress. The first test version of the JENDL-5 called JENDL-51 has been created by updating neutron reaction data for about 100 nuclides.

Pyroelectric power generation from the waste heat of automotive exhaust gas

Kim, J.*; 山中 暁*; 村山 一郎*; 加藤 孝典*; 坂本 友和*; 川崎 卓郎; 福田 竜生; 関野 徹*; 中山 忠親*; 武田 雅敏*; et al.

Sustainable Energy & Fuels (Internet), 4(3), p.1143 - 1149, 2020/03

https://doi.org/10.1039/C9SE00283A

Waste heat is a potentially exploitable energy source but remains a problem awaiting a solution. To explore solutions for automobile applications, we investigate pyroelectric power generation from the temperature variation of exhaust gas using a novel electro-thermodynamic cycle. Niobium-doped lead zirconate titanate stannate (PNZST) ceramics were applied as pyroelectric materials, and their structural characteristics were investigated. In the driving cycle assessments (JC-08) using real exhaust gas, the maximum power generated was identified as 143.9 mW cm (777.3 J L per 1 cycle) over a temperature range of 150-220 C and an electric field of 13 kV cm-1. The net mean generating power of the total driving cycle was 40.8 mW cm, which is the most enhanced result in our power generating systems to date and 314 times greater than our first report. Materials with sharp transition behaviors with the temperature and electric field are worthy of study with regard to pyroelectric energy harvesting materials, and their corresponding crystal and domain structures were investigated to optimize performance.

Enhancement of element production by incomplete fusion reaction with weakly bound deuteron

Wang, H.*; 大津 秀暁*; 千賀 信幸*; 川瀬 頌一郎*; 武内 聡*; 炭竃 聡之*; 小山 俊平*; 櫻井 博儀*; 渡辺 幸信*; 中山 梓介; et al.

Communications Physics (Internet), 2(1), p.78_1 - 78_6, 2019/07

https://doi.org/10.1038/s42005-019-0165-1

陽子(あるいは中性子)過剰核の効率的な生成経路を探索することは、原子核反応研究の主な動機のひとつである。本研究では、Pdに対する核子当たり50MeVの陽子および重陽子入射による残留核生成断面積を逆運動学法によって測定した。その結果、重陽子入射ではAgやPd同位体の生成断面積が大きくなることを実験的に示した。また、理論計算による解析から、この生成断面積の増大は重陽子の不完全融合反応に起因することを示した。これらの結果は、陽子過剰核の生成において重陽子のような弱束縛核の利用が有効であることを示すものである。

Temperature stability of PIN-PMN-PT ternary ceramics during pyroelectric power generation

茂呂 拓哉*; Kim, J.*; 山中 暁*; 村山 一郎*; 加藤 孝典*; 中山 忠親*; 武田 雅敏*; 山田 昇*; 西畑 保雄; 福田 竜生; et al.

Journal of Alloys and Compounds, 768, p.22 - 27, 2018/11

https://doi.org/10.1016/j.jallcom.2018.07.182

Relaxor-based ternary Pb(InNb)O-Pb(MgNb)O-PbTiO (PIN-PMN-PT) ceramics near a morphotropic phase boundary were grown, and their electrical properties at various temperatures were investigated in the electrothermodynamic cycle for the future environment-friendly automotive applications. Structural disordering, depending on the PIN content, influenced the diffuse phase transition between the tetragonal and cubic structures and contributed to the power-generating behavior. The net power-generating energies (P) were 2.43-3.01 mW/cm at temperatures above 200C and were maintained at above 1 mW/cm over a temperature range of approximately 100 degrees. Therefore, the PIN-PMN-PT system has a possibility of a wider usage temperature range, the disordering of the perovskite crystal structure can be controlled, and it will be a candidate for the application of pyroelectric energy conversion system.

Pyroelectric power generation with ferroelectrics (1-x)PMN-xPT

Kim, J.*; 山中 暁*; 中島 啓*; 加藤 孝典*; Kim, Y.*; 福田 竜生; 吉井 賢資; 西畑 保雄; 馬場 将亮*; 武田 雅敏*; et al.

Ferroelectrics, 512(1), p.92 - 99, 2017/08

https://doi.org/10.1080/00150193.2017.1349991

We have been investigating a novel electrothermodynamic cycle based on temporal temperature variations using the pyroelectric effect to utilize the waste heat as renewable energy. An improved generating performance with relaxer ferroelectric ceramics was achieved using 75Pb(MgNb)O-25PbTiO which is well known for the high dielectric and pyroelectric properties. The potential was evaluated by using the hysteresis loops and generating properties are analyzed both in laboratory and engine dynamometer. Results showed 0.48 mW/cm in engine dynamometer assessment, which is 3 times larger than the previous study using Pb(Zr,Ti)O.

平成26年度福島第一原子力発電所周辺における航空機モニタリング(受託研究)

眞田 幸尚; 森 愛理; 石崎 梓; 宗像 雅広; 中山 真一; 西澤 幸康; 卜部 嘉; 中西 千佳; 山田 勉; 石田 睦司; et al.

JAEA-Research 2015-006, 81 Pages, 2015/07

JAEA-Research-2015-006.pdf:22.96MB

2011年3月11日に発生した東日本大震災による津波に起因した東京電力福島第一原子力発電所事故によって、大量の放射性物質が周辺に飛散した。事故直後より、放射線の分布を迅速かつ広範囲に測定する手法として、航空機等を用いた空からの測定方法が適用されている。本報告書には、平成26年度に実施した航空機モニタリングの結果についてまとめた。

Spin pumping blocked by single-layer graphene

白 怜士*; 田代 隆治*; 中山 裕康*; 家田 淳一; 圓谷 志郎; 境 誠司; 安藤 和也*

Applied Physics Express, 8(7), p.073009_1 - 073009_3, 2015/07

https://doi.org/10.7567/APEX.8.073009

NiFe/Pt二重層の境界面に、単層グラフェン(SLG)を挿入するとスピンポンピングが強力に抑制されることを見いだした。NiFe/Pt二重層におけるスピンポンピングは、強磁性層の磁化緩和を促進させる。このことは、強磁性共鳴線幅のマイクロ波周波数依存性により定量的に評価される。我々は、このスピンポンピングによる磁化緩和の促進が、NiFe/SLG/Pt三重層において消失することを示す。本成果は、単一原子層によってスピンポンピングが遮断されることを示しており、金属系のスピンポンピングにおける界面短距離スピン交換結合の重要性を明らかにするものである。

Isolation and characterization of the fragrant cyclamen -methyltransferase involved in flower coloration

秋田 祐介; 北村 智; 長谷 純宏; 鳴海 一成; 石坂 宏*; 近藤 恵美子*; 亀有 直子*; 中山 真義*; 谷川 奈津*; 森田 裕将*; et al.

Planta, 234(6), p.1127 - 1136, 2011/12

https://doi.org/10.1007/s00425-011-1466-0

Anthocyanin -methyltransferase (OMT) is one of the key enzymes for anthocyanin modification and flower pigmentation. We previously bred a novel red-purple-flowered fragrant cyclamen (KMrp) from the purple-flowered fragrant cyclamen "Kaori-no-mai" (KM) by ion-beam irradiation. Since the major anthocyanins in KMrp and KM petals were delphinidin 3,5-diglucoside and malvidin 3,5-diglucoside, respectively, inactivation of a methylation step in the anthocyanin biosynthetic pathway was indicated in KMrp. We isolated and compared genes expressed in KM and KMrp petals. RT-PCR analysis revealed that was expressed in the petals of KM but not in KMrp. Three additional s with identical sequences were expressed in petals of both KM and KMrp. Genomic PCR analysis revealed that was not amplified from the KMrp genome, indicating that ion-beam irradiation caused a loss of the entire region in KMrp. In vitro enzyme assay demonstrated that CkmOMT2 catalyzes the 3' or 3',5' -methylation of the B-ring of anthocyanin substrates. These results suggest that CkmOMT2 is functional for anthocyanin methylation, and defective expression of is responsible for changes in anthocyanin composition and flower coloration in KMrp.