Update neutron_physics.rst (#2504)

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Huw Rhys Jones 2023-05-02 00:51:34 +01:00 committed by GitHub
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@ -91,7 +91,7 @@ inelastic scattering reactions. The specific multi-group scattering
implementation is discussed in the :ref:`multi-group-scatter` section.
Elastic scattering refers to the process by which a neutron scatters off a
nucleus and does not leave it in an excited. It is referred to as "elastic"
nucleus and does not leave it in an excited state. It is referred to as "elastic"
because in the center-of-mass system, the neutron does not actually lose
energy. However, in lab coordinates, the neutron does indeed lose
energy. Elastic scattering can be treated exactly in a Monte Carlo code thanks