ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
New short-lived resonance states of NO22− have been studied by bombarding NO2− anions by low-energy, mono-energetic electrons at the ASTRID heavy-ion storage ring. Storage for several seconds before the measurement ensures full vibrational relaxation of NO2− target anions. The dianion resonances were identified by the detection of resonances in the cross section for formation of neutral NO2. Two resonances were observed: The one of lowest energy is assigned to be the ground state of NO22− based on an ab initio calculation. This state may be held by a Coulomb barrier alone. A second state of significantly higher energy is argued to be held by a combined Coulomb and centrifugal barrier. Finally, a new scheme in which electron recombination may create stable dianions is proposed. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1328380
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