Their unique properties are important in Accelerator Mass Spectrometry the most sensitive trace-element detection method, with 14C-dating as the best-known example 5.
Negative ions are present in many types of plasmas where they influence the formation and destruction of molecules and act as important charge carriers e.g., in interstellar clouds 1, 4. Recent observations of molecular negative ions in space have led to a boost in the field of their spectroscopy, e.g., refs. Negative ions are essential in many natural environments and in a large range of applications. Nature Communications volume 13, Article number: 5906 ( 2022) High-precision electron affinity of oxygen
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