Joint Evaluated Fission and Fusion (JEFF) Library version 4.0 test 4
JEFF-4T4 brings significant updates, particularly to Fission Products and Fission Yields. This release is an important milestone on the path to JEFF-4.0.
Superseded test library
Please note that this is a superseded test library that has not been approved for formal release and has been replaced with another test library version.
Updates to the Major Actinides were in progress, with new files expected in 2025. These will be incorporated into JEFF-4T5.
For a comprehensive overview of the changes introduced in JEFF-4T4, we invite you to refer to this spreadsheet: JEFF-4 Evolution. It provides detailed insights into the modifications made.
Fission Yields (FY)
JEFF-4T4 includes a new evaluation of the Pu-239 thermal neutron-induced fission yields. The U-235 evaluation has not changed, but its correlation matrices have been regularized.
Each evaluation contains: - the cumulative FY evaluation in the ENDF6 format - the independent FY evaluation in the ENDF6 format - the cumulative FY correlation matrix - the independent FY correlation matrix - a file describing how to read and use the correlation matrices
| Release | Format | Content | # files | Download |
|---|---|---|---|---|
| JEFF-4T4 | ENDF6 | Thermal fission of U-235 | 5 | Download |
| JEFF-4T4 | ENDF6 | Thermal fission of Pu-239 | 5 | Download |
Thermal Scattering Law (TSL)
JEFF-4T4 takes TSL from JEFF-4T3, with the addition of: - Be (Beryllium): new evaluation by Douglas Di Julio (ESS) - H and C in CH_2 (Polyethylene): provided by Kemal Ramic (ORNL) and fixed by Tim Ware (JACOBS) - Zr and H in ZrH_2 (Zirconium Hydride): new evaluation by Ingrid Svajger (IJS) - Zr and H in ZrH_1.5 (Zirconium Hydride): new evaluation by Ingrid Svajger (IJS) - H in HF (Hydrogen Fluoride): new evaluation by Jaiswal Vaibhav (IRSN) - Bi-209 (Bismuth): new evaluation by Douglas Di Julio (ESS)
| Release | Format | Content | # files | Download |
|---|---|---|---|---|
| JEFF-4T4 | ENDF6 | Thermal Scattering Law Evaluations (download all) | 36 | Download |
| JEFF-4T4 | ENDF6 | Thermal Scattering Law Evaluations (download only new) | 9 | Download |
| JEFF-4T4 | ENDF6 | Thermal Scattering Law Evaluations (choose and download) | 36 | Link |
Neutron induced cross section evaluations
Changes compared to JEFF-4T3: - All TENDL files have been replaced with the latest TENDL-2023 data, released in August 2024 - Al-27 was taken from JEFF-4T1 to preserve MF32 and MF33 - Ar-42, Ti-44,46-50, Kr-81, Nb-93m, Ag-108m, Cd-113m, Sn-121m, Pm-145,146, Eu-150, Tb-157, Dy-154, Hf-172,178n, Re-186m, Os-194, Ir-192n, Hg-194, Pb-202,210, Bi-207,210m, Ra-228, Bk-248, Es-252 were missing in JEFF-3.3 and have been taken from TENDL-2023 as they are included in the JEFF-3.3 decay data library and have half life longer than 1 year. - New evaluations for Pd-108, Te-127m, Cs-134, Pm-148, Pm-148m, Pm-149, Sm-150, Eu-153, Gd-153 - W-180,182-184,186 were taken from the IAEA. Those are ENDF/B-8.0 files which include the IAEA fast evaluation (2006) and latest RRR evaluation (2013) based on Geel data. - U-233: ENDF/B-VIII.1 file with JEFF-4T3 resonances and MF3/MT102 from JENDL-5 - Te-128, Am-241: new branching ratios - Minor corrections were made on many files. A special thank to all the contributors*
Greg Bailey (UKAEA), David Bernard (CEA), Oscar Cabellos (UPM), Roberto Capote (IAEA), Cedric Jouanne (CEA), Tim Gaines (AWE), Andrew Holcomb (NEA), Luiz Leal (ORNL), Caleb Mattoon (LLNL), Gilles Noguere (CEA), Jean-Christophe Sublet (IAEA), Andrej Trkov (IJS), Tim Ware (JACOBS)
For a comprehensive overview of the changes, please refer to the following spreadsheet: JEFF-4 Evolution.
| Release | Format | Code | Content | # files | Download |
|---|---|---|---|---|---|
| JEFF-4T4 | ENDF6 | - | Cross section evaluations (download all) | 592 | Download |
| JEFF-4T4 | ENDF6 | - | Cross section evaluations (choose and download) | 592 | Link |
| JEFF-4T4 | ENDF6 | - | Cross section evaluations (download all) | 2847 | Download |
| JEFF-4T4 | ENDF6 | - | Cross section evaluations (choose and download) | 2847 | Link |