Evolution of synchrotron-radiation-based Mössbauer absorption spectroscopy for various isotopes

Makoto Seto, Ryo Masuda, Yasuhiro Kobayashi, Shinji Kitao, Masayuki Kurokuzu, Makina Saito, Shuuich Hosokawa, Hiroki Ishibashi, Takaya Mitsui, Yoshitaka Yoda, Ko Mibu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Synchrotron-radiation-based Mössbauer spectroscopy that yields absorption type Mössbauer spectra has been applied to various isotopes. This method enables the advanced measurement by using the excellent features of synchrotron radiation, such as Mössbauer spectroscopic measurement under high-pressures. Furthermore, energy selectivity of synchrotron radiation allows us to measure 40K Mössbauer spectra, of which observation is impossible by using ordinary radioactive sources because the first excited state of 40K is not populated by any radioactive parent nuclides. Moreover, this method has flexibility of the experimental setup that the measured sample can be used as a transmitter or a scatterer, depending on the sample conditions. To enhance the measurement efficiency of the spectroscopy, we developed a detection system in which a windowless avalanche photodiode (APD) detector is combined with a vacuum cryostat to detect internal conversion electrons adding to X-rays accompanied by nuclear de-excitation. In particular, by selecting the emission from the scatterer sample, depth selective synchrotron-radiation-based Mössbauer spectroscopy is possible. Furthermore, limitation of the time window in the delayed components enables us to obtain narrow linewidth in Mössbauer spectra. Measurement system that records velocity dependent time spectra and energy information simultaneously realizes the depth selective and narrow linewidth measurement.

Original languageEnglish
Article number78
JournalHyperfine Interactions
Volume238
Issue number1
DOIs
Publication statusPublished - 2017 Nov 1
Externally publishedYes

Keywords

  • Depth selective measurement
  • Simultaneous acquisition system for timing and energy information
  • Synchrotron-radiation-based Mössbauer absorption spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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