Which type of radiation source would pose the greatest health risk when used internally for a medical procedure? A)an alpha emitter,t_1/2 = 6 hours B)a beta emitter,t_1/2 = 5 hours C)a beta emitter,t_1/2 = 15 days D)a gamma emitter,t_1/2 = 4 hours

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Alpha particles have a high ionizing power and are very damaging when absorbed internally. Despite having a short half-life (6 hours in this case), if an alpha emitter is ingested or injected into the body during a medical procedure, it can cause significant cellular damage and increase the risk of cancer. Beta and gamma particles have less ionizing power and can be more easily shielded against, making them less of a health risk in internal medical procedures.

Which Type of Radiation Source Would Pose the Greatest Health