Molecular structure measurements of swift complex ions traversing thin carbon foils. [C/sub 3/, NCO, and CH/sub 2/ ions]
The final data and analysis of the Coulomb explosion of two molecular systems, C/sub 3//sup +/ /sup 0/ /sup -/ and NCO/sup +/ /sup 0/ /sup -/, each measured in the positive, neutral and negative charge state are reported. In addition, a new measurement has been made with the CH/sub 2//sup +/ ion and preliminary results are reported. All of these complex molecules are produced as negative ions by either a sputtering process with solid materials (30 kV Cs/sup +/ ions on KCNO or C), or from a plasma by off-axis direct extraction of a duoplasmatron (operated with mixtures of H/sub 2/, HN/sub 3/ and CO/sub 2/). Analysis of the three C/sub 3//sup +/ /sup 0/ /sup -/ species showed them all to have the same intranuclear separation found in normal neutral C/sub 3/; 2.5(a)A, and similarly for the three NCO/sup +/ /sup 0/ /sup -/ species, except that the separation was rather small; 2.0(1)A. Preliminary analysis of the CH/sub 2//sup +/ data indicates that the best fit included angle, ..cap alpha../sub i/, between the two hydrogen atoms is 122/sup 0/(3) with an average absolute deviation angle from equilibrium, ..delta cap alpha../sub i/, of 23/sup 0/(2) for a molecular model with linear uniform oscillation, and ..cap alpha../sub i/ = 126/sup 0/(3), ..delta cap alpha../sub i/ = 19/sup 0/(2), for a model with simple harmonic oscillation. These preliminary values compare well with the measured value of 115/sup 0/ for neutral CH/sub 2/. (WHK)
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5281178
- Report Number(s):
- BNL-31013; CONF-820131-2; ON: DE82009923; TRN: 82-014226
- Resource Relation:
- Conference: Conference on charge states and dynamic screening of swift ions, Honolulu, HI, USA, 25 Jan 1982; Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
CARBON IONS
ION SPECTROSCOPY
MOLECULAR IONS
MOLECULAR STRUCTURE
CARBON
COULOMB IONIZATION
FOILS
MOLECULAR BEAMS
BEAMS
CHARGED PARTICLES
ELEMENTS
IONIZATION
IONS
NONMETALS
SPECTROSCOPY
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions