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Invisible harm from ionizing radiation
By Bjorn Hilt | International Physicians for the Prevention of Nuclear War | December 8, 2015
Besides the terrible effects of the burst of light that causes eye damage, the heat that sets everything flammable on fire, the electromagnetic pulse that knocks out all electronic devices, and the blast that produces winds with ten times the force of a hurricane, demolishing everything, the detonation of nuclear weapons also leads to the emission of large amounts of ionizing radiation, which has serious deleterious effects on humans and many other species. Ionizing radiation is, in fact, a lurking danger as we cannot see it, we cannot smell it, we cannot hear it, and we cannot feel it immediately. But we certainly get harmed from it.
To reduce exposure to ionizing radiation and the risk of deleterious effects, we doctors usually warn our patients against having frequent examinations or procedures that involve x-rays. That is because x-rays are ionizing radiation that can harm your body in the same ways as radiation emitted by nuclear detonations. The main difference is that, for medical purposes, the radiation is applied in a controlled way.
The international standard unit for the dose of ionizing radiation is the Sievert. National guidelines in many countries warn against people having a cumulative dose of ionizing radiation exceeding 0.001 Sievert/year. The dose from a full body CT scan is 0.01 – 0.03 Sievert.
The ionizing radiation to which everybody in the vicinity of a nuclear detonation is exposed is so high and immediate that measuring in Sievert does not have much meaning. Such exposures are measured in Gray, where five Gray is reckoned to be lethal to 50% of those exposed (LD50). Even though these types of exposures are not directly comparable, for the common types of ionizing radiation, 1 Gray equals approximately 1.3 Sievert. … continue
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