Information on MISC5XS

Released: 1982-07-25

The data library MISC5XS contains corrected data for ENDF/B-V based Zr as described below, and the libraries IRNAT, MISCXS, ARKRC, TM169, GDT2GP, and T2DDC. None of these data libraries have been previously distributed through RSICC.

The ENDF/B-V Zr data has been corrected for five ZAID's from the libraries RMCCS, DRMCCS, ENDF5P, DRE5, and EPRIXS. [1,2] Below is a summary of the changes that have been made:

(Previous)	(Corrected)
RMCCS 40000.51c -->	40000.57c MISC5XS 300K
DRMCCS 40000.51d -->	40000.57d MISC5XS 300K
ENDF5P 40000.50c -->	40000.56c MISC5XS 300K
DRE5 40000.50d -->	40000.56d MISC5XS 300K
EPRIXS 40000.53c -->	40000.58c MISC5XS 600K

The data previously released as GDT2GP provide ENDF/B-V based Gd cross-section with photon production data from T-2 (LANL). The photon-production data are only valid up to 1 MeV. Since the photon production data were added to an existing set (ENDF5U), the neutron heating information is incorrect for this library and should not be used. [3]

The data previously released as ARKRC are from both ENDF and ENDL sources. The neutron cross-section information for the Kr isotopes are from ENDF, while the cross-sections are from ENDL for Ar. Photon production data were added by T-2 (LANL). Photon production data were included to provide the user with rough estimates for quantities such as photon heating, not for detailed calculations. [4]

The data previously released as T2DDC were provided by T-2 (LANL) for Br-79, Br-81, Rb-85, Rb-87, I-127 and Cs-133. All evaluations, with the exception of Cs-133, are incomplete having no photon production, heating numbers, or angular distribution information. [5]

References

1. Repairing ENDF/B-V Zirconium Cross Sections", R.E. Seamon, Los Alamos National Laboratory internal memorandum, X-6:RES-91-358 (1991).
2. Revised ENDF/B-V Zirconium Cross Sections", R.E. Seamon, Los Alamos National Laboratory internal memorandum, X-6:RES-92-324 (1992).
3. ENDF/B-V Gd Cross Sections with Photon Production", R. C. Little and R. E. Seamon, Los Alamos National Laboratory internal memorandum, X-6:RCL:RES-86-30 (1986).
4. Argon and Kyrpton Cross-section Files", R. C. Little, Los Alamos National Laboratory internal memorandum, June 30, 1982.
5. Cross Sections in ACE Format for Various IP Target Materials", R. C. Little, Los Alamos National Laboratory internal memorandum, August 19, 1982.