JEFF-3.1 evaluated data library

This release has been superseded.

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-3.1 release 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. JEFF-3.1 combines the efforts of the JEFF and EFF/EAF working groups who have contributed to this combined fission and fusion file.

Feedback on JEFF-3.1

The complete JEFF-3.1 Library suite is in ENDF-6 format and contains:

General Purpose files (links to contents pages):

• Incident Neutron Data for 381 materials from 1-H-1 to 100-Fm-255.
• Thermal Scattering Data for 9 materials.
• Incident Proton Data for 26 materials.

Special Purpose files (links to data source):

• Radioactive decay data (39 MB) for 3852 isotopes. Contents list available in Contents_JEFF31RDD.pdf.
• Neutron Induced Fission Yields Library (4.1 MB)
• Spontaneous Fission Yields Library (0.4 MB)
• Activation Library (110 MB) Documentation available in JEFF-3A.pdf.

Last reviewed: 10 March 2016