RSICC DATA LIBRARY DLC-218

1. NAME AND TITLE OF DATA LIBRARY

POINT2003: A Temperature-Dependent, Linearly Interpolable, Tabulated Cross Section Library Based on ENDF/B-VI, Release 8.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAMS

None included. Any codes which treat the ENDF/B-VI format can be used as data retrieval programs.

3. CONTRIBUTOR

Lawrence Livermore National Laboratory, Livermore, California.

4. HISTORICAL BACKGROUND AND INFORMATION

The ENDF/B data library, available from the National Nuclear Data Center (NNDC) at Brookhaven National Laboratory, was recently updated to ENDF/B-VI, Release 8. These data were processed into the form of temperature dependent cross sections at LLNL and are being distributed as POINT2003 by RSICC and the National Nuclear Data Center (NNDC). Many changes were made in ENDF/B-VI evaluation between the previous version of this library (DLC-212 / POINT2000), which was based on release 7 data, and the current version. See the included UCRL-ID-12776 Rev. 2 document for details on these changes.

5. APPLICATION OF THE DATA

As distributed, the original evaluated data include cross sections represented in the form of a combination of resonance parameters and/or tabulated energy dependent cross sections, nominally at 0 Kelvin temperature. For use in applications, these ENDF/B-VI, Release 8 data were processed into the form of temperature dependent cross sections at eight temperatures between 0 and 2100 Kelvin, in steps of 300 Kelvin. At each temperature the cross sections are tabulated and linearly interpolable in energy. POINT2003 contains all of the evaluations in the ENDF/B-VI general purpose library, which contains evaluations for 328 materials (isotopes or naturally occurring elemental mixtures of isotopes). No special purpose ENDF/B-VI libraries, such as fission products, thermal scattering, photon interaction data are included. The majority of these evaluations are complete, in the sense that they include all cross sections over the energy range 10-5 eV to at least 20 MeV. However, the following are only partial evaluations that either only contain single reactions and no total cross section (Mg²⁴, K⁴¹, Ti⁴⁶, Ti⁴⁷, Ti⁴⁸, Ti⁵⁰ and Ni⁵⁹), or do not include energy dependent cross sections above the resonance region (Ar⁴⁰, Mo⁹², Mo⁹⁸, Mo¹⁰⁰, In¹¹⁵, Sn¹²⁰, Sn¹²² and Sn¹²⁴). The CCC-638/TART2000 code package will soon be updated to TART2002, which is recommended for use with these data. Codes within TART can be used to display these data or to run calculations using these data.

6. SOURCE AND SCOPE OF DATA

The PSR-351/PREPRO2002 code system was used to process the ENDF/B data. Listed below are the steps, including the PREPRO2002 codes, which were used to process the data in the order in which the codes were run.

1) Linearly interpolable, tabulated cross sections (LINEAR)

2) Including the resonance contribution (RECENT)

3) Doppler broaden all cross sections to temperature (SIGMA1)

4) Check data, define redundant cross sections by summation (FIXUP)

5) Update evaluation dictionary in MF/MT=1/451 (DICTIN)

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM

No data retrieval program is included in the package. The PSR-351/PREPRO2002 package may be used to plot the POINT2003 data. The PSR-333/CHENDF6.13 code system for handling ENDF/B data may be used to access these data.

8. DATA FORMAT AND COMPUTER

In this library each evaluation is stored as a separate file. The entire library is in the computer independent ENDF/B-VI character format, which allows the data to be easily transported between computers. The entire library requires approximately 1.6 gigabyte of storage. (D00218/MNYCP/00).

9. TYPICAL RUNNING TIME

Not applicable.

10. REFERENCES

a. Documentation available with library:

D. E. Cullen, "POINT 2003, A Temperature Dependent ENDF/B-VI, Release 8, Cross Section Library," UCRL-ID-12776-Rev-2 (May 22, 2003).

b. Other useful documentation:

D.E. Cullen, "PREPRO 2002: 2002 ENDF/B Pre-processing Codes," IAEA-NDS-39, Rev. 11 (February 5, 2003).

D. E. Cullen, "TART2000 - A Coupled Neutron-Photon 3-D, Combinatorial Geometry, Time Dependent Monte Carlo Transport Code," UCRL-ID 126455, Rev. 3 (November 2000).

11. CONTENTS OF LIBRARY

The data are approximately 1.6 gigabyte in size and are distributed on three CD's written in DOS format. The referenced document in 10.a is also included on CD.

12. DATE OF ABSTRACT

July 2003.

KEYWORDS: BASED ON ENDF/B-VI; EVALUATED NEUTRON CROSS SECTIONS.