resonance-ionization mass spectrometry

physics

Also known as: RIMS

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July 13, 2026

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Resonance-ionization mass spectrometry (RIMS) is a highly sensitive and selective analytical technique that combines Resonance-Ionization Spectroscopy (RIS) with mass spectrometry. RIS uses lasers to eject electrons from specific atoms or molecules, creating ions and free electrons that are then detected. This process is particularly useful for distinguishing between isotopes and isobars, which can be challenging for traditional mass spectrometers. RIMS offers enhanced sensitivity and reduces interference from molecular ions, making it valuable for applications such as dating ancient materials, studying groundwater, and detecting trace elements.123

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Resonance-ionization mass spectrometry
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For the purpose of determining the relative weights of atomic nuclei, the mass spectrometer is one of the most useful instruments used by analytical chemists. If two atoms with the same number of protons (denoted Z) contain different numbers of
Read More