# Cross Section Interface – pyne.xs¶

Pyne provides a top-level interface for computing (and caching) multigroup neutron cross sections. These cross sections will be computed from a variety of available data sources (stored in nuc_data.h5). In order of preference:

1. CINDER 63-group cross sections,

2. A two-point fast/thermal interpolation (using ‘simple_xs’ data from KAERI),

3. or physical models.

Top-level functionality may be be found in this package’s API module:

from pyne.xs.api import *


In the future, this package should support generating multigroup cross sections from user-specified pointwise data sources (such as ENDF or ACE files).

Cross Section Modules