Nuclear magnetic resonance is the phenomenon in which atoms that absorbed electromagnetic waves will store and release them over a specific amount of time. If containment of a nuclear reactor fails, large amounts of gamma radiation will be released into the atmosphere, and the matter within a specific radius around the breach will absorb the gamma rays and will release them slowly. The speed at which an element releases the absorbed radiation is relative to its strength in different molecular bonds. The strength of the bonds can be measured with an NMR spectrometer, a machine which emits electromagnetic waves within a controlled container at a sample of a specific element, isotope, or compound, and measures the time it takes for the sample to release the amount of waves first emitted. Using nuclear magnetic resonance spectroscopy can determine bond connectivity between atoms in an organic molecule. It can determine if a compound is cyclic or aromatic.
Current Research:
Nuclear magnetic resonance is measured in the isotopes of various elements, most notably in the synthetic elements (atomic numbers 104-118) to determine their phases of matter and the strengths they would have in a bond. Unfortunately, the half lives for many of the synthetic elements are nothing but a few hundred microseconds long (the half-life for Oganesson-294 [atomic# 118] is about 890 microseconds), and usually end up as various isotopes of Actinides before any extensive testing can be done.
Sources:
http://hyperphysics.phy-astr.gsu.edu/hbase/Nuclear/nmr.html
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