Neutron Compton effect of hydrogen in materials

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K12650
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 80040:Quantum beam science-related
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: IKEDA Kazutaka 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 特別准教授 (80451615)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 中性子散乱 / 水素 / 同位体 / 干渉性散乱

Outline of Final Research Achievements

Neutrons are known to be suitable for determining hydrogen positions in materials because they are directly scattered by nuclei, but they are actually effective only for deuterium, and are not suitable for light hydrogen, which is as light as neutrons, due to inelastic scattering processes caused by recoil phenomena. In this study, neutron diffraction measurements of alkali metal hydrides, alkaline earth metal hydrides, complex hydrides, transition metal hydrides, and deuterides were performed to analyze the effect of coherent scattering cross sections, which vary with neutron wavelength and scattering angle, on crystal structure factors.

Free Research Field

中性子科学

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた中性子の波長と散乱角により変化する干渉性散乱断面積に関する知見は、重水素化が困難で構造解析が断念されてきた軽水素化物の構造解析を可能にすることが期待される。