57Fe polarization‐dependent synchrotron Mössbauer spectroscopy using a diamond phase plate and an iron borate nuclear Bragg monochromator. (13th February 2015)

• Record Type: Journal Article
• Authors: Mitsui, Takaya; Imai, Yasuhiko; Masuda, Ryo; Seto, Makoto; Mibu, Ko
• Is Part Of: Journal of synchrotron radiation. Volume 22:Part 2(2015)
• Page Start: 427
• Page End: 435
• Publication Date: 2015-02-13
• Subjects: Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577514028306
• Languages: English
• ISSNs: 0909-0495

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Energy‐domain ⁵⁷Fe 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 ⁵⁷Fe‐Mössbauer radiation with a narrow bandwidth of ∼3.4 Γ₀ (Γ₀≃ 4.7 neV: natural linewidth of the ⁵⁷Fe nucleus) from the broadband synchrotron radiation. The developed nuclear diffraction optics allowed ⁵⁷Fe‐Mössbauer studies to be performed with various polarization states, <italic>i.e.</italic> 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 (⁵⁷Fe: 95%) iron thin film are described.</p> </abstract>