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The Photon and Charged Particle Data Center has long been an international source of photon and charged particle reference data that have been used in stand-alone applications or integrated into transport codes to solve problems in radiation physics.
Another function of the Center has been to evaluate computer codes, to modify them when necessary, and to use them to solve problems in support of dosimetry projects at the NIST. The focus of the Center in recent years has been 1) to address the issue of uncertainty in some of the Center’s databases, 2) to investigate the integration of some nuclear physics into the Center’s databases (photonuclear cross sections) and Monte Carlo capabilities (proton transport), and 3) to provide reference data and publications for some of the Dosimetry Group’s radiation sources. Maintaining the Center is critical to avoid knowledge gaps that would make it impossible to completely specify the uncertainty in standards and protocols.