Atomic and molecular anions exposed to external magnetic
and/or electric fields
show a variety of intriguing new properties.
Some of these species do even exist exclusively due to the presence of the
external fields and cannot persist
in field-free space.
Examples for these field-induced anions are the Beryllium, Nitrogen, Neon,
Magnesium and Argon negative ions.
The number of bound states depending on the field strength B and the parameter values (polarizability, mass) of the species.
