diff --git a/docs/source/methods/physics.rst b/docs/source/methods/physics.rst index ed10b32343..d0a6a2c992 100644 --- a/docs/source/methods/physics.rst +++ b/docs/source/methods/physics.rst @@ -187,11 +187,11 @@ secondary photons from nuclear de-excitation are tracked in OpenMC. ------------------------ These types of reactions are just treated as inelastic scattering and as such -are subject to the same procedure as described in -:ref:`inelastic-scatter`. Rather than tracking multiple secondary neutrons, the -weight of the outgoing neutron is multiplied by the number of secondary -neutrons, e.g. for :math:`(n,2n)`, only one outgoing neutron is tracked but its -weight is doubled. +are subject to the same procedure as described in :ref:`inelastic-scatter`. For +reactions with integral multiplicity, e.g., :math:`(n,2n)`, an appropriate +number of secondary neutrons are created. For reactions that have a multiplicity +given as a function of the incoming neutron energy (which occasionally occurs +for MT=5), the weight of the outgoing neutron is multiplied by the multiplcity. .. _fission: