Study of radiation defect clusters, their structure and properties in, proton-irradiated silicon

ABSTRACTP-Cu2-δ Se(δ=0.025) samples, self-doped through a departure from the stoichiometry(po= 4.8·1020) and cadmium-doped up to a concentration po= 5.6·1020cm−3 were studied in the course of their irradiation in a reactor up to a fluance of -6·1020 n·cm−2 of fast neutrons at a temperature of -500-550° C. The dependence of the resistivity and thermo-emf on the fast neutron fluence is described in terms of the theory of effective medium and representation of defect clusters as dielectric inclusions in a conducting matrix of p-Cu2Se(Cd) and p-Cu2_δSe samples.Defect clusters of a mean radius of -27 Å are shown to appear not only because of scattering of the fast pile neutrons on copper and selenium atoms, but also due to a nuclear reaction 112Cd(n,γ)114Cd on thermal neutrons with an efficiency of 3.43 cm−1. Increase of the conductivity in the process of the reactor irradiation of p-Cu2-δSe at small fluences of fast neutrons and appearance of a whitish deposit of selenium on the surface of samples after high fluences of fast neutrons were observed.

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Equilibrium thermodynamics of radiation defect clusters in δ-phase Pu–Ga alloys

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2015.11.015 ◽

2016 ◽

Vol 468 ◽

pp. 46-55 ◽

Cited By ~ 8

Author(s):

A.V. Karavaev ◽

V.V. Dremov ◽

G.V. Ionov

Keyword(s):

Radiation Defect ◽

Equilibrium Thermodynamics ◽

Defect Clusters ◽

Δ Phase

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The kinetics of formation and the parameters of radiation defect clusters in silicon

Radiation Effects ◽

10.1080/00337577608240826 ◽

1976 ◽

Vol 30 (4) ◽

pp. 227-232 ◽

Cited By ~ 10

Author(s):

V. L. Vinetskii ◽

A. V. Kondrachuk

Keyword(s):

Radiation Defect ◽

Defect Clusters ◽

Kinetics Of Formation ◽

Kinetics Of

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Modification of Structure and Properties of Superconducting YBaCuO Crystals by Combined Irradiations

MRS Proceedings ◽

10.1557/proc-659-ii7.8 ◽

2000 ◽

Vol 659 ◽

Author(s):

Elvira M. Ibragimova ◽

Marquis A. Kirk

Keyword(s):

Magnetic Properties ◽

Gamma Irradiation ◽

Flux Pinning ◽

Critical Parameter ◽

Structure And Properties ◽

Defect Clusters ◽

Oxygen Defects ◽

Diamagnetic Transition

ABSTRACTEffects of electron irradiations in combination with 60Co gamma-quanta on magnetic properties of YBa2Cu3O7−x crystals have been studied to determine the contribution from oxygen defects to the pinning, and the condition of improving the critical parameter, Jc, of the crystals. Irradiation with 300 keV electrons followed by gamma-irradiation makes strong oxygen disorder, causing degradation of SC-transition and appearance of diamagnetic transition at 200 K, but no flux pinning in H>1 Tesla at 77 K. However, it is shown that oxygen defects do contribute substantially to the flux pinning at cation-anion defect clusters in CuO-planes created by moderate fluences of 1 MeV-electrons. A model is suggested for different oxygen and copper defects induced by the irradiations.

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