2018年2月
Nuclear resonant scattering experiment with fast time response: Photonuclear excitation of Hg-201
PHYSICAL REVIEW C
- 巻
- 97
- 号
- 2
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevC.97.024607
- 出版者・発行元
- AMER PHYSICAL SOC
Nuclear resonant excitation and detection of its decay signal for the 26.27-keV level of Hg-201 is demonstrated with high-brilliance synchrotron radiation (SR) and a fast x-ray detector system. This SR-based photonuclear excitation scheme, known as nuclear resonant scattering (NRS) in the field of materials science, is also useful for investigating nuclear properties, such as the half-lives and radiative widths of excited nuclear levels. To date, because of the limited time response of the x-ray detector, the nuclear levels to which this method could be applied have been limited to the one whose half-lives are longer than similar to 1 ns. The faster time response of the NRS measurement makes possible NRS experiments on nuclear levels with much shorter half-lives. We have fabricated an x-ray detector system that has a time resolution of 56 ps and a shorter tail function than that reported previously. With the implemented detector system, the NRS signal of the 26.27-keVstate of Hg-201 could be clearly discriminated from the electronic scattering signal at an elapsed time of 1 ns after the SR pulse. The half-life of the state was determined as 629 +/- 18 ps, which has better precision by a factor of three compared with that reported to date obtained from nuclear decay spectroscopy.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevC.97.024607
- ISSN : 2469-9985
- eISSN : 2469-9993
- Web of Science ID : WOS:000424503200003