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A miniaturized piezoelectric Mössbauer spectrometer with feedback control.

P Guzman¹, C M Quine¹, S H Lohaus¹

¹California Institute of Technology, Pasadena, California 91125, USA.

The Review of Scientific Instruments

|November 10, 2023

Summary

A new Mössbauer spectrometer utilizes a piezoelectric actuator for precise Doppler velocity control. This innovation enables compact, cost-effective Mössbauer spectrometry for diverse applications.

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Area of Science:

Nuclear Physics
Materials Science
Spectroscopy

Background:

Traditional Mössbauer spectrometers often face limitations in size, cost, and complexity.
Developing advanced Doppler velocity drives is crucial for enhancing Mössbauer spectrometry performance.

Purpose of the Study:

To design and evaluate a novel Mössbauer spectrometer employing a piezoelectric actuator for Doppler velocity generation.
To optimize the performance of the piezoelectric Doppler drive using feedback control and laser Doppler vibrometry.

Main Methods:

Construction of a Mössbauer spectrometer featuring an amplified piezoelectric actuator.
Implementation of a feedback control system for precise Doppler velocity drive.
Utilization of a quadratic displacement waveform to achieve a linear velocity profile.
Optimization using laser Doppler vibrometer measurements.

Main Results:

The piezoelectric Doppler drive was successfully optimized under feedback control.
Characterization using laser Doppler vibrometry confirmed the linear velocity profile.
Evaluation with 57Fe Mössbauer spectra of α-iron demonstrated minimal peak distortions.

Conclusions:

The developed piezoelectric Doppler drive offers a viable alternative for Mössbauer spectrometry.
This technology facilitates the development of small, lightweight, and low-cost Mössbauer spectrometers.
The system's performance supports applications demanding portability and affordability.