NIST X-Ray Form Factor and Attenuation Tables for Elements

NIST X-Ray Form Factor, Attenuation and Scattering Tables - SRD 66 provides tabulated form factors, photoabsorption cross sections, and total attenuation coefficients for chemical elements. The database covers all elements with atomic number Z ≤ 92, as compiled by the National Institute of Standards and Technology. Version 2.1 was last updated in July 2022.

Use Cases

• Calculate photoelectric attenuation coefficients for specific elements and X-ray energies for shielding design.
• Analyze scattering contributions from form factors in theoretical physics models.
• Apply correction factors for UV-Vis or gamma-ray spectroscopy based on element-specific data.
• Model thermoelectric properties using form factor and conversion factor data for material science.

Strengths

• Covers all 92 naturally occurring chemical elements (Z ≤ 92).
• Provides multiple key physics parameters: form factors, photoabsorption cross sections, and total attenuation coefficients.
• Maintained by the authoritative National Institute of Standards and Technology (NIST).
• Updated to version 2.1 in July 2022.

Limitations

• Data is presented in HTML format, which is not ideal for direct computational analysis.
• The underlying data collection and calculation methodology is not detailed in the provided description.
• No information is provided on the granularity (e.g., energy step size) or row count of the tabulated data.

Provenance

Source

National Institute of Standards and Technology (NIST)

Collection Method

Theoretical calculations and compilation, likely based on Dirac-Hartree-Fock methods as suggested by tags.

Freshness

Last updated on 2022-07-29.