OXYGEN-ATOM INTERACTION WITH RADIATION DEFECTS IN NB IRRADIATED BY HEIONS

Authors
MEDEUOV BI DAUKEEV DK WEBB RP
Citation
Bi. Medeuov et al., OXYGEN-ATOM INTERACTION WITH RADIATION DEFECTS IN NB IRRADIATED BY HEIONS, Vacuum, 45(5), 1994, pp. 579-582
Citations number
21
Categorie Soggetti
Physics, Applied
Journal title
Vacuum → ACNP
ISSN journal
0042207X
Volume
45
Issue
5
Year of publication
1994
Pages
579 - 582
Database
ISI
SICI code
0042-207X(1994)45:5<579:OIWRDI>2.0.ZU;2-1
Abstract
The aim of this work is to check the hypothesis regarding the formatio n of complexes such as an interstitial impurity helium-vacancy cluster . Nb wires uniformly implanted by 24 MeV alpha-particles at 320 K are investigated by means of the internal friction technique. It is shown that oxygen atoms occupying interstitial sites in Nb BCC-structure are trapped during irradiation and after annealing up to T approximately 470 K. Analysing the detrapping oxygen recovery curves with i n situ m easurements of internal friction and helium thermo-desorption, spectra it has been concluded that oxygen atoms can interact with He(m)V(n)-c lusters and be the nucleation sites. This experimental result is discu ssed in the light of computer simulation of high-energy ion implantati on in Nb using the TRIM program.