Publication | Closed Access
On a Metastable Energy State of the Negative Helium Ion
82
Citations
3
References
1955
Year
Negative Helium IonEngineeringPhysicsNatural SciencesApplied PhysicsCondensed Matter PhysicsAtomic PhysicsPlasma PhysicsPhysical ChemistryChemistryQuantum ChemistryTriplet StateBose-einstein CondensationLowest Triplet StateIon ProcessIon Structure
By applying the selection rules of auto-ionization to the (1s2s2p)4P state of the negative helium ion, it is shown that only the 4P5/2 energy level is not liable to auto-ionization. Provided the lowest triplet state of the atom has positive electron affinity, this ionic state is metastable in the same sense as the triplet state.
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