Open Access57 Fe polarization‐dependent synchrotron Mössbauer spectroscopy using a diamond phase plate and an iron borate nuclear Bragg monochromator
Author(s) -
Mitsui Takaya,
Imai Yasuhiko,
Masuda Ryo,
Seto Makoto,
Mibu Ko
Publication year - 2015
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577514028306
Subject(s) - monochromator , synchrotron radiation , polarization (electrochemistry) , materials science , optics , synchrotron , diamond , analytical chemistry (journal) , chemistry , physics , wavelength , chromatography , composite material
Energy‐domain 57 Fe polarization‐dependent synchrotron radiation Mössbauer spectroscopy was developed by using a diamond X‐ray phase plate and an iron borate nuclear Bragg monochromator. The former controls the polarization of the incident synchrotron radiation X‐rays and the latter filters the 57 Fe‐Mössbauer radiation with a narrow bandwidth of ∼3.4 Γ 0 (Γ 0 ≃ 4.7 neV: natural linewidth of the 57 Fe nucleus) from the broadband synchrotron radiation. The developed nuclear diffraction optics allowed 57 Fe‐Mössbauer studies to be performed with various polarization states, i.e. linear polarization, circular polarization and non‐polarization. In this paper, the spectrometer system, beam characterization, performance‐test experiments and a grazing‐incidence Mössbauer measurement of an isotope‐enriched ( 57 Fe: 95%) iron thin film are described.