https://doi.org/10.1351/goldbook.08640
Lifetime of an excited state of a molecule that is isolated from radiation fields and other molecules or entities.
Notes:
- The lifetime is limited by the probability of spontaneous emission to a lower state. If an excited state, \(n\) can only emit spontaneously to a single lower state \(m\), the natural lifetime of state \(n\) equals the reciprocal of \(A_{mn}\), the Einstein transition probability of spontaneous emission.
- SI unit: \(\pu{s}\)