metastable state


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metastable state

a transient energy state of an atom with a half-life longer than 10-12 seconds (e.g., technetium99m).
References in periodicals archive ?
to a metastable state, the excess electron distribution becomes asymmetric in the hydration shell and separated from a neutral I atom.
Then the atoms are excited to the metastable state and transferred to a magnetic trap, where the lifetime can be measured.
2]/2v in Equation 5, the length of metastable state refrigerant could be derived though Equation 10 given the fact that the specific volume and the friction factor of such a region rarely change:
Existing research has shown that novel and creative behaviors can spontaneously emerge when a complex system is poised in the metastable state.
It is established that in the zone of local plastic action occurs a change in structure and mechanical properties of the workable metal, also, in the process of working the zone LPA, found in the metastable state in comparison with the base metal, leads to an instantaneous change of the stress-strained state in the zone of chip formation.
This is a metastable state analogous to supercooling or supersaturation.
Open-air operation is possible by creating plasma particles that remain in a metastable state for a few tenths of a second.
The strong coupling between subsystems leads to conditions for metastability, which become more favourable with higher complexity: a political system may be suspected to be generally in a metastable state and thus ready for mutation once the fluctuation attains a critical level.
The atoms would eventually decay spontaneously but, since they are in a metastable state, this would take some time.
The pump laser causes the energy level in the erbium atoms to be elevated from the ground state, and then to decay to an intermediate metastable state.
After turning off the white light, the drain current dropped slowly and eventually settled at a metastable state of 260 nA.