The newxsd library is a discrete version of the newxs library. The newxs library contains LANL based evaluations based off of previous libraries such as ENDL85, ENDF/B-V, and Group T-2. The isotopes adjusted and source of data can be seen in the table below.
|Isotope||Source of Previous Data|
*See "n+11B Gamma-Ray Production Evaluation"
Discrete neutron cross-section tables are equivalent to continuous-energy tables except that all cross sections have been averaged over 262 energy bins, creating a histogram structure for the cross sections. These are not multigroup data tables, as the secondary energy and angular distribution data remains completely continuous.
Discrete libraries were a useful concept when computer memory and speed were significant issues. We maintain them primarily for backwards compatibility, and recommend against their use unless a specific reason for doing so can be provided.
NEWXSD can be downloaded either as a zip file or as a compressed tarball
If further information is required contact a member of the Data Team by e-mail at firstname.lastname@example.org