TY - JOUR
T1 - Vacancy-type defect production in iron under ion beam irradiation investigated with positron beam Doppler broadening technique
AU - Iwai, Takeo
AU - Ito, Yasuo
AU - Koshimizu, Masanori
PY - 2004/8/1
Y1 - 2004/8/1
N2 - Accumulation of vacancy-type defects in iron produced by various ion irradiations at room temperature was investigated with positron beam Doppler broadening technique. Various ion species (He, C, O, Fe) were used for investigation of the effect of PKA energy on vacancy-type defect production. Accumulation of vacancy-type defects leads to sharpening of Doppler broadening spectra, i.e., increase of S parameter. S parameter was measured as a function of ion fluence for various ion species at a fixed positron energy of 15 keV. At the early stage of irradiation, S parameter increases with increasing fluence, and then it reaches some saturated S parameter value that varies with ion species. The saturated S parameter values tend to be higher for heavier ion irradiation. When compared with the incremental change of S parameter at the same low dpa level, heavier ions also lead to a greater change.
AB - Accumulation of vacancy-type defects in iron produced by various ion irradiations at room temperature was investigated with positron beam Doppler broadening technique. Various ion species (He, C, O, Fe) were used for investigation of the effect of PKA energy on vacancy-type defect production. Accumulation of vacancy-type defects leads to sharpening of Doppler broadening spectra, i.e., increase of S parameter. S parameter was measured as a function of ion fluence for various ion species at a fixed positron energy of 15 keV. At the early stage of irradiation, S parameter increases with increasing fluence, and then it reaches some saturated S parameter value that varies with ion species. The saturated S parameter values tend to be higher for heavier ion irradiation. When compared with the incremental change of S parameter at the same low dpa level, heavier ions also lead to a greater change.
UR - http://www.scopus.com/inward/record.url?scp=3342984075&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3342984075&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2004.04.064
DO - 10.1016/j.jnucmat.2004.04.064
M3 - Conference article
AN - SCOPUS:3342984075
VL - 329-333
SP - 963
EP - 966
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 1-3 PART B
T2 - Proceedings of the 11th Conference on Fusion Research
Y2 - 7 December 2003 through 12 December 2003
ER -