Negative ion formation by Rydberg electron transfer: Isotope-dependent rate constants
The formation of negative ions during collisions of rubidium atoms in selected ns and nd Rydberg states with carbon disulfide molecules has been studied for a range of effective principal quantum numbers (10 {le} n* {le} 25). For a narrow range of n* near n* = 17, rate constants for CS{sub 2}{sup {minus}} formation are found to depend upon the isotopic composition of the molecule, producing a negative ion isotope ratio (mass 78 to mass 76, amu) up to 10.5 times larger than the natural abundance ratio of CS{sub 2} isotopes in the reagent. The isotope ratio is found to depend strongly upon the initial quantum state of the Rydberg atom and perhaps upon the collision energy and CS{sub 2} temperature. 32 refs., 5 figs., 1 tab.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5622085
- Report Number(s):
- CONF-910402-15; ON: DE91012058
- Resource Relation:
- Conference: 201. American Chemical Society (ACS) national meeting, Atlanta, GA (USA), 14-19 Apr 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANIONS
PRODUCTION
CARBON SULFIDES
ATOM-MOLECULE COLLISIONS
RUBIDIUM
ELECTRON TRANSFER
MASS SPECTRA
RYDBERG STATES
ALKALI METALS
ATOM COLLISIONS
CARBON COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
IONS
METALS
MOLECULE COLLISIONS
SPECTRA
SULFIDES
SULFUR COMPOUNDS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena
640302 - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory