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gamma-Ray wavelength standard for atomic scales.
Y V Shvyd'ko1, M Lerche, J Jäschke
1II. Institut für Experimentalphysik, Universität Hamburg, D-22761 Hamburg, Germany.
Physical Review Letters
|September 16, 2000
Summary
The wavelength of 57Fe Mössbauer radiation was precisely measured using silicon crystals, yielding a highly reproducible value. This accurate measurement establishes it as a potential standard for atomic-scale length measurements.
Area of Science:
- Atomic Physics
- Metrology
- Solid State Physics
Background:
- Accurate determination of fundamental physical constants is crucial for scientific advancement.
- Mössbauer spectroscopy provides a unique probe for nuclear and material properties.
- Establishing precise length standards is essential for nanoscale research and technology.
Purpose of the Study:
- To accurately measure the wavelength of the 57Fe Mössbauer radiation.
- To evaluate its potential as a standard for atomic dimensions.
- To achieve a high-precision determination of the Mössbauer gamma-ray wavelength.
Main Methods:
- Utilized Bragg backscattering geometry with a high-quality silicon crystal.
- Employed high-precision interferometry techniques for wavelength determination.
- Minimized systematic uncertainties through careful experimental design.
Main Results:
- The wavelength of 57Fe Mössbauer radiation was determined to be lambda(M) = 0.860 254 74(16)x10(-10) m.
- The relative uncertainty of the measurement is 0.19 ppm.
- The corresponding Mössbauer photon energy is E(M) = 14 412.497(3) eV.
Conclusions:
- The measured wavelength of 57Fe Mössbauer radiation is highly reproducible.
- The radiation's precise wavelength makes it suitable as a length standard at the atomic scale.
- This work contributes to the development of advanced metrological standards.