ENDF/B-VI.8 Evaluated Nuclear Data Library

ENDF Reports and Documentation

• ENDF/B-VI.8 Summary Document
• ENDF-6 Formats Manual (ENDF-102)
• Library download

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IAEA Nuclear Data Section Summaries

• H.D. Lemmel, "EN6-PHOTO" and "JEF-2/PHOTO" PHOTO-ATOMIC INTERACTION DATA LIBRARY, IAEA-NDS-58, Rev. 5 (2001)
• H.D. Lemmel, P.K. McLaughlin, ENDF/B-6 Standards Library 1987, IAEA-NDS-88, Rev. 3 (1994).
• H.D. Lemmel, P.K. McLaughlin, ENDF/B-6 Standards Library 1987, IAEA-NDS-88, Rev. 4 (2002).
• H.D. Lemmel, P.K. McLaughlin, V.G. Pronyaev, ENDF/B-VI Release 8 (Last release of ENDF/B-VI) The U.S. Evaluated Nuclear Data Library for Neutron Reaction Data, IAEA-NDS-100, Rev. 11 (2001).
• H.D. Lemmel, P.K. McLaughlin, V.G. Pronyaev, ENDF/B-6 charged-particle sublibraries, IAEA-NDS-105, Rev. 6 (2000).
• H.D. Lemmel, ENDF/B-6 FPY The ENDF/B-6 fission-product yield sublibraries, IAEA-NDS-106, Rev. 3 (1995).
• H.D. Lemmel, ENDF/B-6 Decay Data Library, IAEA-NDS-108 (1992).

Library Summary

ENDF/B-VI encompasses 9 separate releases, each detailed in the Summary of Tapes and summarized here:

• Version VI of the ENDF/B data file was released July 1990, which was subsequently named Version VI.0.
• Version VI.1 was released in September 1991 and contained corrective revisions.
• Version VI.2 was released in June 1993 and provided new evaluations for 24 isotopes.
• Version VI.3 was released in May 1995 and contained new evaluations for 11 materials, with some evaluations extending in neutron energy to 40 MeV. This was the first attempt to include high-energy evaluations.
• Version VI.4 was released in December 1996 and was mainly a corrective revision of Version VI.3.
• Version VI.5 was released over 1997-1998 and included 14 new evaluations, as well as two proton-induced files and one deuteron-induced file.
• Version VI.6 was released over 1998-1999 and included 33 evaluations with a neutron energy range from 20 MeV to 150 MeV, as well as 33 proton-induced evaluations up to 150 MeV.
• Version VI.7 was released over 1999-2000 and included 17 new evaluations of fission products, as well as general-purpose evaluations.
• Finally, Version VI.8 was released in 2001 and included 8 new evaluations and 33 evaluations, which were modified to include thermal neutron photon production data.

Format Changes

The description of the formats and procedures are documented in BNL-NCS-44945.

The File 3 changes include the following. The limit on the number of energy points (NP) is changed from 10,000 to 50,000 points.

The file 4 changes include the following. The highest order Legendre polynomial (NL), (given at each energy) is 64.

The File 5 changes include the following. There is a correction of the LF = 1 example, so that all secondary energy distributions start and end with zero values for the distribution function.

The File 6 changes include the addition of the reference system for secondary energy and angle, LCT = 3, for the center of mass system for both angle and energy of light particles (A <= 4), laboratory system for heavy recoils (A > 4). This is for use in continuum energy-angle distribution when Kalbach-Mann systematics are not used, LANG != 2.

-- Adapted from the ENDF/B-VII format manual, Appendix I "Historic Perspective", By Norman Holden.