Study on thorium-229 Low-lying Isomer state and its application for fundamental physics
| Project/Area Number |
18H01230
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
Yoshimura Koji 岡山大学, 異分野基礎科学研究所, 教授 (50272464)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
笠松 良崇 大阪大学, 理学研究科, 講師 (70435593)
|
|---|
| Project Period (FY) |
2018-04-01 – 2021-03-31
|
| Project Status |
Completed (Fiscal Year 2020)
|
| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2018: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
|
|---|
| Keywords | 原子核時計 / トリウム / 放射光X線 / 核共鳴散乱 / 物理定数の経年変化 / X線検出器 / 暗黒物質 / レーザー / 実験核物理 / トリウム229 / 放射光Ｘ線 / 放射光 / 周波数標準 / APD / 物理定数の時間変化 |
|---|
| Outline of Final Research Achievements |
We have succeeded in artificially producing the first excited state (isomer state) of thorium-229, which has the smallest excitation energy in the world. The isomer state was produced via the second excited state by a new method using nuclear resonant scattering with high-brilliance synchrotron radiation X-rays and a fast X-ray detector. This study has enabled us to produce a large number of thorium-229 isomer states in controllable manner, and we will make effective use of the produced isomer states to elucidate the isomer states in detail.
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究で達成された手法により、トリウム229のアイソマー状態の解明が進めば、トリウム原子核のレーザー励起、さらに原子核時計の早期の実現が可能となる。トリウム229を用いた原子核時計は、最先端の原子時計を上回る精度を達成できる可能性があり、様々な分野への応用が期待されている。基礎物理分野においては、物理定数の経年変化の検証、新しい手法での暗黒物質探索、等、新しい物理探究のプラットホームを提供可能である。
|
Report
(4 results)
Research Products
(28 results)
-
-
-
-
-
[Journal Article] Absolute X-ray energy measurement using a high-accuracy angle encoder2021
Author(s)
Masuda Takahiko、Watanabe Tsukasa、Beeks Kjeld、Fujimoto Hiroyuki、Hiraki Takahiro、Kaino Hiroyuki、Kitao Shinji、Miyamoto Yuki、Okai Koichi、Sasao Noboru、Seto Makoto、Schumm Thorsten、Shigekawa Yudai、Tamasaku Kenji、Uetake Satoshi、Yamaguchi Atsushi、Yoda Yoshitaka、Yoshimi Akihiro、Yoshimura Koji
-
Journal Title
Journal of Synchrotron Radiation
Volume: 28
Issue: 1
Pages: 111-119
DOI
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
