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Masuda T, Yoshimi A, Fujieda A, Fujimoto H, Haba H, Hara H, Hiraki T, Kaino H, Kasamatsu Y, Kitao S, Konashi K, Miyamoto Y, Okai K, Okubo S, Sasao N, Seto M, Schumm T, Shigekawa Y, Suzuki K, Stellmer S, Tamasaku K, Uetake S, Watanabe M, Watanabe T, Yasuda Y, Yamaguchi A, Yoda Y, Yokokita T, Yoshimura M, Yoshimura K. X-ray pumping of the 229Th nuclear clock isomer. Nature 2019; 573:238-242. [DOI: 10.1038/s41586-019-1542-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 07/23/2019] [Indexed: 11/09/2022]
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Masuda T, Okubo S, Hara H, Hiraki T, Kitao S, Miyamoto Y, Okai K, Ozaki R, Sasao N, Seto M, Uetake S, Yamaguchi A, Yoda Y, Yoshimi A, Yoshimura K. Fast x-ray detector system with simultaneous measurement of timing and energy for a single photon. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:063105. [PMID: 28667968 DOI: 10.1063/1.4989405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We developed a fast X-ray detector system for nuclear resonant scattering (NRS) experiments. Our system employs silicon avalanche photo-diode (Si-APD) as a fast X-ray sensor. The system is able to acquire both timing and energy of a single X-ray photon simultaneously in a high rate condition, 106 counts per second for one Si-APD. The performance of the system was investigated in SPring-8, a synchrotron radiation facility in Japan. Good time resolution of 120 ps (FWHM) was achieved with a slight tail distribution in the time spectrum by a level of 10-9 at 1 ns apart from the peak. Using this system, we successfully observed the NRS from the 26.27-keV level of mercury-201, which has a half-life of 630(50) ps. We also demonstrated the reduction of background events caused by radioactive decays in a radioactive sample by discriminating photon energy.
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Affiliation(s)
- T Masuda
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - S Okubo
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - H Hara
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - T Hiraki
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - S Kitao
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
| | - Y Miyamoto
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - K Okai
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - R Ozaki
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - N Sasao
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - M Seto
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
| | - S Uetake
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - A Yamaguchi
- Quantum Metrology Laboratory, RIKEN, Saitama 351-0198, Japan
| | - Y Yoda
- Japan Synchrotron Radiation Research Institute, Hyogo 679-5198, Japan
| | - A Yoshimi
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
| | - K Yoshimura
- Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
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Leu BM, Alatas A, Sinn H, Alp EE, Said AH, Yavaş H, Zhao J, Sage JT, Sturhahn W. Protein elasticity probed with two synchrotron-based techniques. J Chem Phys 2010; 132:085103. [DOI: 10.1063/1.3332585] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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