Which decay product increases when spent nuclear fuel rods undergo neutron emission?

💡 Explanation

Neutron emission induces beta decay in fission fragments; because Cesium-137 is a common product, its concentration increases due to beta decay transforming neutron-rich isotopes; therefore, A is correct, rather than others, which describe different decay outcomes or elements.

• Which risk increases when a catalytic converter overheats?
• Which consequence results when gravitational lensing unexpectedly magnifies distant quasar images?
• Which electromagnetic consequence arises when a microwave waveguide's dimensions become smaller than half a wavelength?
• Which mechanism causes zero resistance below critical temperature?
• Which outcome occurs when reactive sites on a solid catalyst become poisoned during a chemical reaction?
• Which risk increases when fuel-air mixtures approach stoichiometric ratio during combustion?