THE EFFECT OF RADIATION DAMAGE ON DEUTERON RE-EMISSION AND TRAPPING IN CARBON.
Measurements have been made of the amount of deuterium gas re- emitted from Papyex carbon during deuteron bombardment with a deuteron energy range of 100 eV to 1000 eV. Prior to the measurements, a carbon target is pre-bombarded with a deuteron beam up to a fluence at which the target was saturated with deuterons. When it is heated up to a temperature higher than +- 2000 K, lattice damge in carbon can be fully annealed and the implanted deuterons totally released. But when the target is heated up to +- 1500 K it is possible to thermally release the deuterium trapped in the surface layer without annealing the damage. The experimental data for both annealed and damaged samples defined above are presented in the form of percentage re- emission as a function of deuteron fluence. A significant difference between the behaviour of the damaged and annealed samples is noted for all incident energies above 100 eV. These features are discussed in terms of three models: (1) a damage build-up model, (2) a Gaussian trapping model, and (3) a fluence dependent detrapping model.
Bibliographic Reference: JOURNAL OF NUCLEAR MATERIALS, VO. 111 & 112 (1983), PP. 606-615
Record Number: 1989122009000 / Last updated on: 1987-01-01
Available languages: en