Bremsstrahlung refers to radiation produced in which context?

• A. The gamma rays emitted during radioactive decay.
• B. Radiation produced when charged particles are accelerated.
• C. Bremsstrahlung requires strong magnetic fields.
• D. Radiation produced when charged particles are decelerated.

Answer: (D)

Bremsstrahlung is the radiation emitted when a fast charged particle, typically an electron, is slowed down or deflected as it passes near the electric field of a nucleus in matter. This interaction changes the particle’s velocity (an acceleration), and that change radiates photons. In practice, this is the X-ray radiation produced as electrons decelerate in target atoms, yielding a continuous spectrum with a maximum energy equal to the incident electron energy. It does not require magnetic fields, and gamma rays from radioactive decay come from nuclear transitions, not from deceleration in a material. The deceleration mechanism precisely captures why Bremsstrahlung occurs.