Velocity-dependent isotope fractionation in secondary-ion emission

Journal Article · Thu Jan 15 00:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.877· OSTI ID:6749283

Gnaser, H; Hutcheon, I D

The formation of secondary ions is subject to isotopic fractionation (differing ionization probabilities for two isotopes) that depends linearly on the inverse velocity of the ejected ions. Theoretically, such a correlation follows directly from an exponential dependence of the ionization probability P on v/sup -1/, Pproportionalexp(-v/sub 0//v). The parameter v/sub 0/, derived from the experiment, amounts to --2 x 10/sup 6/ cm/sec for B, Si, and Ca ions.

• Research Organization: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125
• OSTI ID: 6749283
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 35:2
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM IONS
SECONDARY EMISSION
CALCIUM IONS
FLUORITE
SPUTTERING
OXYGEN IONS
COLLISIONS
SILICON IONS
FRACTIONATION
ISOTOPE RATIO
KEV RANGE 10-100
MASS SPECTROSCOPY
SILICON
TOURMALINE
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
BORON COMPOUNDS
BORON SILICATES
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CHARGED PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
FLUORIDES
FLUORINE COMPOUNDS
HALIDE MINERALS
HALIDES
HALOGEN COMPOUNDS
IONS
KEV RANGE
MINERALS
OXYGEN COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SPECTROSCOPY
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)