Directional lithium hydride Compton profiles of 0.1% statistical accuracy

Area of Science:

• Atomic and Molecular Physics
• Condensed Matter Physics
• Materials Science

Background:

• Compton profile measurements are crucial for understanding electron momentum density.
• High-accuracy measurements require sophisticated instrumentation and rigorous data processing.

Purpose of the Study:

• To review the current status and accuracy of electron momentum density determination using experimental Compton profiles.
• To detail the methods for achieving high accuracy in Compton profile measurements.

Main Methods:

• Utilizing third-generation synchrotron radiation sources for Compton scattering experiments.
• Applying corrections for impulse approximation deviations, multiple scattering, and analyser response.
• Implementing detailed procedures for data from Johann-type scanning spectrometers.

Main Results:

• Achieved 0.1% statistical accuracy at the Compton peak with new spectrometers.
• Demonstrated comparable accuracy for Compton profiles after applying corrections.
• Calculated the reciprocal form factor via Fourier transform of the Compton profile.

Conclusions:

• High-accuracy electron momentum density determination is feasible with modern techniques.
• Careful data correction is essential for reliable Compton profile analysis.
• The reciprocal form factor is a valuable tool for data treatment and presentation.