“…The concentration of defects: (+) A-centre; (1, Ã) G16-centre and divacancies; (2) I-centre in the conducting matrix of Cz n-Si (n 0 1.21 Â 10 14 cm ±3 ) as a function of fast-pile neutron fluence From comparison of the curves 2 in Figs. 5 and 6, one can see that the function I(f m ) is larger in the FZ n-Si than in Cz n-Si by about two orders, because the oxygen is known to be a recombination centre, as the donors in 5th-group Ge [13]. After an irradiation dose of 3.8 Â 10 13 in Cz n-Si and 3.2 Â 10 13 in FZ n-Si, concentrations of A-and CiCscentres are decreased.…”
Section: Temperature Dependence Of Carrier Concentrationmentioning
confidence: 99%
“…Therefore, for a coordination of the expressions for spherical cluster with the received expressions for clusters having by a smaller depolarizing field, it is necessary to consider B* 2B and L x is calculated from (13).…”
Section: Variation Of Carrier Removal Rate In Fast-pile Neutron Irradmentioning
Float-zone and Czochralski phosphorus-doped n-Si samples with a resistivity r > 40 Wcm were investigated after irradiation with various doses of fast-pile neutrons. Equations for the calculation of average and instantaneous carrier removal rates by clusters and point defects in the conducting matrix of high-resistivity Si have been derived. Only the calculation of defect recharges in the space-charge regions of clusters allowed to determine the temperature dependence of the effective carrier concentration. Simple defect build-up kinetics for deep acceptor levels have been calculated with the assumption that apart from the V 2 -, E-, and G16 centres interstitial Si was also accumulated in the conducting matrix.
“…The concentration of defects: (+) A-centre; (1, Ã) G16-centre and divacancies; (2) I-centre in the conducting matrix of Cz n-Si (n 0 1.21 Â 10 14 cm ±3 ) as a function of fast-pile neutron fluence From comparison of the curves 2 in Figs. 5 and 6, one can see that the function I(f m ) is larger in the FZ n-Si than in Cz n-Si by about two orders, because the oxygen is known to be a recombination centre, as the donors in 5th-group Ge [13]. After an irradiation dose of 3.8 Â 10 13 in Cz n-Si and 3.2 Â 10 13 in FZ n-Si, concentrations of A-and CiCscentres are decreased.…”
Section: Temperature Dependence Of Carrier Concentrationmentioning
confidence: 99%
“…Therefore, for a coordination of the expressions for spherical cluster with the received expressions for clusters having by a smaller depolarizing field, it is necessary to consider B* 2B and L x is calculated from (13).…”
Section: Variation Of Carrier Removal Rate In Fast-pile Neutron Irradmentioning
Float-zone and Czochralski phosphorus-doped n-Si samples with a resistivity r > 40 Wcm were investigated after irradiation with various doses of fast-pile neutrons. Equations for the calculation of average and instantaneous carrier removal rates by clusters and point defects in the conducting matrix of high-resistivity Si have been derived. Only the calculation of defect recharges in the space-charge regions of clusters allowed to determine the temperature dependence of the effective carrier concentration. Simple defect build-up kinetics for deep acceptor levels have been calculated with the assumption that apart from the V 2 -, E-, and G16 centres interstitial Si was also accumulated in the conducting matrix.
An explanation for the photoinduced reconstruction of Cu single-crystal surfaces that was observed by Ernst et al. [Science 279, 679 (1998)] under the influence of visible light is proposed. It is suggested that reconstruction can be attributed to the energy released during the nonradiative decay of excitons that were excited by light irradiation and captured on surface active centers. The estimates performed show that exciton decay on surface steps and adatoms releases enough energy to create surface defects.
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