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Non-invasive 3D-Visualization with Sub-micron Resolution Using Synchrotron-X-ray-tomography

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The 57Fe Synchrotron Mössbauer Source at the ESRF.

Vasily Potapkin¹, Aleksandr I Chumakov, Gennadii V Smirnov

¹European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France.

Journal of Synchrotron Radiation

|June 21, 2012

Summary

A new (57)Fe Synchrotron Mössbauer Source (SMS) offers highly resonant and polarized gamma radiation for Mössbauer spectroscopy. This advanced source enables rapid data collection, significantly reducing experiment times for materials under extreme conditions.

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Area of Science:

Nuclear Physics
Materials Science
Spectroscopy

Background:

Mössbauer spectroscopy traditionally uses radioactive sources, limiting brilliance and resolution.
Synchrotron radiation offers a powerful alternative for nuclear resonant applications.

Purpose of the Study:

To design and describe a (57)Fe Synchrotron Mössbauer Source (SMS) for enhanced energy-domain Mössbauer spectroscopy.
To leverage synchrotron radiation for high-brilliance, polarized, and tunable resonant gamma-ray beams.

Main Methods:

Utilizing a nuclear resonant monochromator with pure nuclear reflections from an iron borate ((57)FeBO(3)) crystal.
Implementing collimation of incident synchrotron radiation for optimal crystal illumination and energy resolution.

Main Results:

The SMS provides tunable (57)Fe resonant radiation (14.4 keV) with a narrow bandwidth (15 neV).
Achieved a focused beam spot size of 10 µm × 5 µm with high brilliance and polarization.
Demonstrated a significant reduction in data acquisition time, e.g., ~10 min for a high-pressure spectrum vs. >1 week.

Conclusions:

The developed SMS is a powerful tool for studying small samples under extreme conditions (high pressure, high temperature, ultrahigh vacuum).
Its high intensity, small spot size, and rapid data collection capabilities revolutionize Mössbauer spectroscopy experiments.
The SMS is compatible with existing experimental setups and operates without gating, enhancing its versatility.