A principal mechanism for energy loss during nuclear fusion is bremsstrahlung. This loss is associated with A) x-rays emitted due to electron-ion collisions. B) radiation losses due to T⁴ losses. C) conduction losses associated with ΔT. D) convection losses associated with ΔT. E) neutron collisions with atoms of moderator.

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Bremsstrahlung refers to the radiation emitted when fast charged particles (in this case, electrons) are slowed down or deflected by interaction with other charged particles (in this case, ions). In nuclear fusion, electrons collide with ions, and this interaction results in the emission of x-rays (bremsstrahlung radiation) and energy loss.

A Principal Mechanism for Energy Loss During Nuclear Fusion Is