Joint Evaluated Fission and Fusion (JEFF) Library version 3.1.1

The Joint Evaluated Fission and Fusion File (JEFF) is an evaluated library produced via an international collaboration of Data Bank member countries co-ordinated under the auspices of the NEA Data Bank. The JEFF library contains neutron reaction data, thermal neutron scattering law data, and incident proton data for transport calculations, as well as special purpose files with radioactive decay data, fission yields data, and activation data. The JEFF library combines the efforts of the JEFF and EFF/EAF working groups.

The JEFF-3.1.1 neutron reaction file was updated in January 2009. However the thermal neutron scattering data and incident proton files remains as in JEFF-3.1.

The JEFF-3.1.1 library contains also special purpose files with radioactive decay data and fission yields data, respectively updated in November 2007 and January 2009. The activation data file remains as in JEFF-3.1.

Superseded library

Please note that this is a superseded library that was approved for formal release but has been replaced with a newer official library version.

Downloads

The complete set of data, including incident-neutron files, thermal scattering data, radioactive decay data, fission yields and activation data are available online at:

oecd-nea.org/dbforms/data/eva/evatapes/jeff_31/index-JEFF3.1.1.html

Reference

Citation

NEA (2009), "The JEFF-3.1.1 Nuclear Data Library", JEFF Report 22, NEA No. 6807, ISBN : 978-92-64-99074-6, Available online.