Fundamental study on shortening the decay time of long-lived beta decay nuclides

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14540
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering
• Research Institution: Osaka Prefecture University
• Principal Investigator: TANIGUCHI Ryoichi 大阪府立大学, 工学(系)研究科(研究院), 教授 (60155215)
• Research Collaborator: TSUJIMOTO Tadashi 安全安心科学アカデミー, 理事長 ; MIYAMARU Hiroyuki 大阪府立大学, 大学院工学研究科, 教授 ; ITO Norio 大阪府立大学, 大学院工学研究科, 助教 ; KOJIMA Takao 大阪府立大学, 大学院工学研究科, 助教
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: ベータ崩壊 / 短寿命化

Outline of Final Research Achievements

The method to shorten the decay time of long-lived β-decay nuclides have been investigated by irradiation for the purpose of reducing the radioactive contamination in Fukushima. Theoretically, the decay time can be reduced by nuclear excitation. In this study, the possibility of them was confirmed experimentally by the use of the γ-rays and X-rays irradiation about several hundred kGy with the natural radioisotope La-138 which has a long half-life of about 100 billion years. As the result, a few change of β-decays corresponding to irradiation dose were observed. However the change was only a few percent and it will be necessary to continue the irradiation experiment.

Free Research Field

放射線計測