Charge-state measurements of backscattered ions from Au films
A small electrostatic accelerator (65 kV) was built as a postaccelerator for measuring the charge-state fractions of ions backscattered from solid or gas targets. A new method is described in which the charge-state fractions of /sup 3/He, /sup 4/He, /sup 12/C, /sup 14/N, and /sup 16/O ions backscattered from gold films are determined simultaneously. The added features in this work are the facts that the method can be efficiently used for low-energy incident ions and that spectra could be measured, compared, and analyzed by minimizing uncertainties inherent in experimental parameters. The energy dependence of the charge-state fractions of /sup 3/He, /sup 4/He, and /sup 12/C ions are measured between 3 MeV and 150 keV. The /sup 12/C charge-state-fraction data nicely fit the Gaussian model but none of the chi/sup 2/ models. The mean ion charge i/sub m/ and the standard deviation s are also measured. Preliminary measurements of the dependence of the charge-state fractions on target thickness are also discussed.
- Research Organization:
- Physics Department, University of Jordan, Amman, Jordan
- OSTI ID:
- 6180559
- Journal Information:
- Phys. Rev. A; (United States), Vol. 39:8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARBON IONS
BACKSCATTERING
GOLD
ION COLLISIONS
HELIUM IONS
NITROGEN IONS
OXYGEN IONS
CHARGE STATES
ENERGY DEPENDENCE
EQUILIBRIUM
FILMS
MEV RANGE 01-10
CHARGED PARTICLES
COLLISIONS
ELEMENTS
ENERGY RANGE
IONS
METALS
MEV RANGE
SCATTERING
TRANSITION ELEMENTS
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)