Bremsstrahlung production increases with

Bremsstrahlung production increases with

• A. Decreasing nuclear charge.
• B. High Z-number nuclei.
• C. Low energy beta particles.
• D. Inert gases.

Answer: (B)

Bremsstrahlung comes from fast electrons being decelerated by the electric field of a nucleus. The strength of that field scales with the nuclear charge, Z. A nucleus with more protons creates a stronger Coulomb field, causing greater deceleration of the electron and more radiation. In other words, the bremsstrahlung yield increases with Z, roughly rising with Z^2, so heavy elements produce much more bremsstrahlung than light ones. The energy of the incident electrons also matters—the more energetic the electrons, the more radiation they can emit—but the dominant factor here is the nuclear charge. Decreasing the nuclear charge weakens the field and lowers emission; low-energy beta particles have less energy to radiate; inert gases are typically low-Z and thus produce less bremsstrahlung.

Bremsstrahlung comes from fast electrons being decelerated by the electric field of a nucleus. The strength of that field scales with the nuclear charge, Z. A nucleus with more protons creates a stronger Coulomb field, causing greater deceleration of the electron and more radiation. In other words, the bremsstrahlung yield increases with Z, roughly rising with Z^2, so heavy elements produce much more bremsstrahlung than light ones. The energy of the incident electrons also matters—the more energetic the electrons, the more radiation they can emit—but the dominant factor here is the nuclear charge. Decreasing the nuclear charge weakens the field and lowers emission; low-energy beta particles have less energy to radiate; inert gases are typically low-Z and thus produce less bremsstrahlung.