Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Top plot: Total attenuation coefficient in water with respect to the photon energy. Bottom plot: Ratio of the results obtained with Geant4 and the NIST XCOM reference data. The black dashed lines in the bottom plot represent the uncertainties of the NIST XCOM data (σref). The statistical uncertainty affecting the Geant4 simulation results is below 1%.
