Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session E02: Applications of Nuclear Physics II
7:00 PM–9:30 PM,
Wednesday, November 29, 2023
Hilton Waikoloa Village
Room: Kona 1
Chair: Lee Bernstein, University of California, Berkeley
Abstract: E02.00003 : The observation of the VUV signal from the isomeric state of 229 thorium nuclei toward realizing the atomic clock*
7:30 PM–7:45 PM
Presenter:
Koichi Okai
(Okayama Univ)
Authors:
Koichi Okai
(Okayama Univ)
kjeld beeks
(TU Wien)
Hiroyuki Fujimoto
(AIST)
Yuta Fukunaga
(Okayama University)
Ming Guan
(Okayama University)
Hiromitsu Haba
(RIKEN)
Takahiro Hiraki
(Okayama University)
Yoshitaka Kasamatsu
(Osaka University)
Shinji Kitao
(Kyoto University)
Kenji Konashi
(Tohoku University)
Takahiko Masuda
(Okayama Univ)
Nobumoto Nagasawa
(JASRI)
Ryoichiro Ogake
(Okayama University)
Noboru Sasao
(Okayama University)
Fabian Schaden
(TU Wien)
Thorsten Schumm
(TU Wien)
Makoto Seto
(Kyoto University)
Yudai Shigekawa
(RIKEN)
Kotaro Shimizu
(Okayama University)
Sayuri Takatori
(Okayama University)
Kenji Tamasaku
(RIKEN)
Satoshi Uetake
(Okayama University)
Makoto Watanabe
(Tohoku University)
Tsukasa Watanabe
(AIST)
Rei Yamamoto
(Okayama University)
Atsushi Yamaguchi
(RIKEN)
Yoshitaka Yoda
(JASRI)
Akihiro Yoshimi
(Okayama University)
Koji Yoshimura
(Okayama University)
Motohiko Yoshimura
(Okayama University)
In our experiment, the thorium-229 nuclei are excited to an isomeric state via the 2nd excited level(29 keV) by irradiation of X-ray as synchrotron radiation from SPring-8. A dedicated measurement system captures the decay events in which the isomeric thorium nucleus emits photons within the VUV region. Finally, we have demonstrated the measurement of the VUV signal and determined both isomeric energy and lifetime. In our presentation, the current status and recent results would be reported.
*The experiment was conducted at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (proposals 2019B1619, 2020A1284, 2021A1389, 2021B1516, 2022A1401, 2022B1418, 2022B1936, 2023A1415 and 2023A1358) and RIKEN. This work was supported by JSPS KAKENHI grant numbers JP19H00685, JP19K21879, JP19K14740, JP21H04473, JP21H01094, JP22K20371 and JP23K13125. The research was supported by the Austrian Science Fund (FWF) Projects: I5971 (REThorIC) and Itoh Science Foundation.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700