Soft x-ray absorption cross section of argon determined by a variable absorber technique

Area of Science:

• Atomic Physics
• X-ray Spectroscopy
• Quantum Mechanics

Background:

• Accurate measurement of atomic cross sections is crucial for understanding light-matter interactions.
• Argon's x-ray absorption properties are fundamental for various applications in plasma physics and material science.
• Previous measurements may have limitations due to instrumental artifacts like higher-order contributions.

Purpose of the Study:

• To precisely determine the x-ray absorption cross section of argon.
• To investigate the spectral region between 1.3-3.8 nm.
• To validate experimental methods for high-accuracy cross-section measurements.

Main Methods:

• Measurement of argon's x-ray absorption cross section.
• Utilized a variable pressure technique to mitigate higher-order light contamination from the monochromator.
• Operated within the 1.3-3.8 nm wavelength range.

Main Results:

• The x-ray absorption cross section of argon was successfully measured.
• The variable pressure technique effectively corrected for higher-order wavelengths.
• Experimental data showed strong agreement with semiempirical calculations and previous experimental findings.

Conclusions:

• The study provides reliable data for argon's x-ray absorption cross section in the specified region.
• The employed variable pressure technique is effective for accurate x-ray spectroscopy.
• This work validates theoretical models and contributes to the body of knowledge in atomic physics.