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161Dy synchrotron-radiation-based Mössbauer absorption spectroscopy


We demonstrate a measurement system for synchrotron-radiation-based Mössbauer absorption spectra with 161Dy using the 25.7 keV nuclear first excited state. Mössbauer spectra of DyF3, Dy metal and DyPc2 (Pc = phthalocyaninato) were obtained and the parameters for the hyperfine structure of 161Dy nuclei in them were evaluated to demonstrate the feasibility of this method. Isomer shifts showed that Dy atoms in all of them are in trivalent state although those in Dy metal was in the region of trivalent metal region. The magnetic hyperfine field of Dy metal of 569 ± 1 T agreed with the literature of the Mössbauer experiments. That of DyPc2 of 489 ± 1 T was reasonable because the ground state of DyPc2 were in the state of Jz = ±13/2. Considering the highly penetrative nature of the 25.7 keV incident radiation, it will be straightforward to apply this method for the study of materials under various conditions such as high pressure, high magnetic fields, and reactive atmospheres.

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The authors would like to thank the Accelerator Group of SPring-8 for their support, especially with the operation of several electron bunch-modes and the top-up injection operation. This work was supported by National Institutes for Quantum and Radiological Science and Technology (QST) through the QST Advanced Characterization Nanotechnology Platform under the remit of “Nanotechnology Platform” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (Proposal Nos. JPMXP09A19QS0022, JPMXP09A20QS0003, JPMXP09A21QS0001). The synchrotron radiation experiments were performed using an experimental station at the beamline of Japan Synchrotron Radiation Institute (JASRI), SPring-8 (Proposal No. 2021A2087) and a QST experimental station at QST beamline BL11XU with the approval of the JASRI (Proposal Nos. 2019B3581, 2020A3581, 2021A3581).

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Correspondence to Ryo Masuda.

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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2021), 5-10 September 2021, Brasov, Romania

Edited by Victor Kuncser

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Masuda, R., Kitao, S., Tajima, H. et al. 161Dy synchrotron-radiation-based Mössbauer absorption spectroscopy. Hyperfine Interact 243, 17 (2022).

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