Nuclear Reaction Data

Modern technologies based on nuclear processes, such as nuclear weapons, power reactors, radiation and materials detectors, medical imaging devices, and radiation therapies, often require more accurate and complete knowledge of nuclear reaction dynamics and nuclear structure. Group members measure, collect, and evaluate nuclear data and incorporate these data into libraries (databases), which are used in LLNL simulations.

The data are usually presented in one of three formats:

GND The new, modern format developed by LLNL.
ENDL The evaluated nuclear and atomic reaction databases developed at LLNL are collectively known as ENDL (Evaluated Nuclear Database Libraries).
ENDF The evaluated nuclear reaction datbases maintained by the National Nuclear Data Center at BNL are known as ENDF (Evaluated Nuclear Data File).

Support for ENDL can be found here. To view ENDL and ENDF data, visit the NADS graphical data plotter. More detail on the translated ENDF data can be found on the ENDF translation page.

Software tools to generate and manage the nuclear reaction databases are provided by the group. An example is FUDGE, which allows researchers to examine the sensitivities of the computed results to variations in the underlying nuclear reaction data. Other tools format the data to be used more efficiently in specific applications:



Bret Beck (

Updated: February 7, 2012