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: E02.00005 : Characterization of Thorium-229 Crystal towards Vacuum Ultraviolet Search from Nuclear Clock isomer*
8:00 PM–8:15 PM
Presenter:
Sayuri Takatori
Authors:
Sayuri Takatori
kjeld beeks
(EPFL)
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 University)
Nobumoto Nagasawa
(JASRI)
Ryoichiro Ogake
(Okayama University)
Koichi Okai
(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)
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)
However direct excitation of 229Th from ground state has not been successfully achieved and the properties of the 229Th isomer in solids have not been experimentally clarified yet. Instead of attempting direct excitation to the 229Th isomer state, we excite 229Th by synchrotron X-ray irradiation to the second excited state with known transition properties and produce the isomeric state of 229Th through a de-excitation process.
In this talk, we would introduce our ongoing characterization experiments using X-ray absorption fine structure spectroscopy (XAFS) methods and the status of our experiments aimed at searching for de-excitation light of 229Th-doped target crystals by scanning with the irradiated X-ray energy at SPring-8, Japan.
*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.
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