Three dimensional defect tomography

2015 Fiscal Year Final Research Report

• Project/Area Number: 26620114
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Analytical chemistry
• Research Institution: Chiba University
• Principal Investigator: Fujinami Masanori 千葉大学, 工学(系)研究科(研究院), 教授 (50311436)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 格子欠陥 / 陽電子 / 量子ビーム / 放射線 / 二次元分布

Outline of Final Research Achievements

Positron annihilation tomography has been developed in order to obtain the three dimensional defect distribution. Positron can be produced using a pair production by short-pulsed bremsstrahlung X-rays. In the study, the short-pulsed X-rays was irradiated uniformly into a sample and the emitted γ-rays was detected by a position sensitive and highly sensitive detector developed. The scintillator was made of Lu2SiO5：Ce with mm order lateral resolution and 0.5 ns time resolution. The performance of the developed technique has been examined in detail. Positron annihilation tomography can be nondestructively applied to the sample subjected under high temperature and high pressure conditions. In this study, we have investigated the defect behavior on hydrogen embrittlement of pure iron and the pore in silica-based glasses.

Free Research Field

分析化学