Interpolation

The interpolation code interp_typ used in the ENDL system specifies the type of interpolation to be used for the data on energy and cross section. Only the values $\tt interp\_typ$ = 0 and 5 are used.

$\tt interp\_typ$ = 0:

Linear-linear interpolation. This is used for all but incident gammas.

$\tt interp\_typ$ = 1:

Piecewise constant (a histogram).

$\tt interp\_typ$ = 2:

Linear-linear interpolation.

$\tt interp\_typ$ = 3:

Linear-log interpolation (logarithmic in x).

$\tt interp\_typ$ = 4:

Log-linear interpolation (logarithmic in y).

$\tt interp\_typ$ = 5:

Log-log interpolation. This is used only for incident photons.