metastable ion


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metastable ion

[¦med·ə′stā·bəl ′ī‚än]
(analytical chemistry)
In mass spectroscopy, an ion formed by a secondary dissociation process in the analyzer tube (formed after the parent or initial ion has passed through the accelerating field).
References in periodicals archive ?
The excess of internal energy imparted to these metastable ions during ionisation is sufficient to give them a rate of decomposition such that the latter occurs during the ion flight-time.
As with metastable ions in a fragmentation process where [M.
An energy slit in the spectrometer also allows it to operate in a bandpass mode rather than a low-pass mode - low energy metastable ions are rejected, leading to lower background counts and better detection limits.