Which risk increases within a radiotherapy treatment room because of cobalt-60 decay?

💡 Explanation

The cobalt-60 source undergoes beta decay to nickel-60, which then emits dangerous gamma photons. Shielding efficacy against the original source decreases because decay products introduce additional gamma radiation, therefore A occurs, rather than altered particle emissions.

• Which consequence occurs when calibrating accelerometers in a static inertial confinement fusion experiment based on the equivalence principle?
• Which outcome occurs when industrial gearboxes use low-viscosity lubricants?
• Which risk increases in a nuclear reactor core during supercriticality?
• Which phenomenon limits the upper frequency of signal transmission in coaxial cables using distributed capacitance?
• Which consequence results when localized corrosion severs metallic bonds?
• Which effect happens when high energy photons strike fullerene C60?