Residence sites of19F implants in carbon allotropes
- 1 May 1989
- journal article
- research article
- Published by Taylor & Francis in Radiation Effects and Defects in Solids
- Vol. 108 (1) , 73-80
- https://doi.org/10.1080/10420158908217871
Abstract
The (p,p') reaction with a pulsed proton beam has been used in in-beam TDPAD measurements to excite and recoil implant 19F ions into various carbon allotropes (single and polycrystalline graphite and vitreous and colloidal carbon). Spin rotation R(t) spectra generated from delayed time spectra of the 19F 197 keV gamma ray show that the implants take up two characteristic residence sites in the host samples. One site is sharply defined (low spread δ), and has a quadrupole coupling frequency of vq = 57 MHz; the other, of lower vq , is more diffuse (large δ). The parameters of the electric field gradients at the two implant sites in the carbon allotropes are compared with similar measurements on 19F in diamond, Si and Ge hosts, and in several F-C compounds.Keywords
This publication has 7 references indexed in Scilit:
- Residence sites for19F ions implanted into diamondHyperfine Interactions, 1987
- A simple explanation of unexpected efg's in19F-TDPAD measurementsHyperfine Interactions, 1987
- The electric quadrupole hyperfine interaction at sites of ion-implanted fluorine in amorphous and crystalline siliconJournal of Physics C: Solid State Physics, 1984
- Electric hyperfine interaction in solid CF4 at the fluorine siteThe Journal of Chemical Physics, 1982
- Radiation-enhanced substitution of fluorine recoil atoms into C-F bonds in MeV-proton bombardment of fluorinated hydrocarbonsHyperfine Interactions, 1981
- On the structure of fluorine defects in amorphous and crystalline silicon studied by hyperfine interaction and channeling methodsAIP Conference Proceedings, 1981
- Minuit - a system for function minimization and analysis of the parameter errors and correlationsComputer Physics Communications, 1975