The term LD 50/60 indicates the dose at which:

The term LD 50/60 refers to the lethal dose of radiation that is expected to kill 50% of a population exposed to whole-body radiation within 60 days. This measure is widely used in radiobiology and toxicology to assess the acute effects of radiation exposure on living organisms. It helps researchers and healthcare professionals understand the severity of radiation exposure and the potential outcomes for individuals affected by radiation.

The "50" denotes that half of the individuals exposed do not survive, while "60" specifies the time frame involved, which is 60 days after exposure. This is significant because it correlates with the acute health effects of high doses of radiation, which can lead to death from radiation sickness within that period due to damage to critical organs and systems.

Understanding this measure is crucial for those studying radiation's impact, as it emphasizes the time frame and percentage of affected individuals, which is vital for emergency response and medical treatment following radiation exposure incidents.