提高冷中子以下中子强度的新材料探索：纳米石墨烯花聚集体

New Material Exploration to Enhance Neutron Intensity below Cold Neutrons: Nanosized Graphene Flower Aggregation.

作者信息

Teshigawara Makoto, Ikeda Yujiro, Yan Mingfei, Muramatsu Kazuo, Sutani Koichi, Fukuzumi Masafumi, Noda Yohei, Koizumi Satoshi, Saruta Koichi, Otake Yoshie

机构信息

J-PARC Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka 319-1195, Ibaraki, Japan.

RIKEN Center for Advanced Photonics, RIKEN, Wako 351-0198, Saitama, Japan.

出版信息

Nanomaterials (Basel). 2022 Dec 23;13(1):76. doi: 10.3390/nano13010076.

DOI:10.3390/nano13010076

PMID:36615985

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9824194/

Abstract

It is proposed that nanosized graphene aggregation could facilitate coherent neutron scattering under particle size conditions similar to nanodiamonds to enhance neutron intensity below cold neutrons. Using the RIKEN accelerator-driven compact neutron source and iMATERIA at J-PARC, we performed neutron measurement experiments, total neutron cross-section and small-angle neutron scattering on nanosized graphene aggregation. For the first time, the measured data revealed that nanosized graphene aggregation increased the total neutron cross-sections and small-angle scattering in the cold neutron energy region. This is most likely due to coherent scattering, resulting in higher neutron intensities, similar to nanodiamonds.

摘要

有人提出，在与纳米金刚石相似的粒径条件下，纳米尺寸的石墨烯聚集体可以促进相干中子散射，以提高冷中子以下的中子强度。利用日本理化学研究所的加速器驱动紧凑型中子源和日本质子加速器研究中心的iMATERIA，我们对纳米尺寸的石墨烯聚集体进行了中子测量实验、总中子截面和小角中子散射实验。首次测量数据表明，纳米尺寸的石墨烯聚集体增加了冷中子能量区域的总中子截面和小角散射。这很可能是由于相干散射，导致中子强度更高，类似于纳米金刚石。