A model for defect formation in materials exposed to radiation

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dc.contributor.authorDavis, Sergio
dc.contributor.authorGonzález-Cataldo, Felipe
dc.contributor.authorGutiérrez, Gonzalo
dc.contributor.authorAvaria, Gonzalo
dc.contributor.authorBora, Biswajit
dc.contributor.authorJalaj Jain, José
dc.contributor.authorPavez, Cristian
dc.contributor.authorSoto, Leopoldo
dc.date.accessioned2022-05-31T16:42:22Z
dc.date.available2022-05-31T16:42:22Z
dc.date.issued2021-01-01
dc.descriptionindexación Scopuses
dc.description.abstractA simple model for the stochastic evolution of defects in a material under irradiation is presented. Using the master-equation formalism, we derive an expression for the average number of defects in terms of the power flux and the exposure time. The model reproduces the qualitative behavior of self-healing due to defect recombination, reaching a steady-state concentration of defects that depends on the power flux of the incident radiation and the material temperature, while also suggesting a particular time scale on which the incident energy is most efficient for producing defects, in good agreement with experimental results. Given this model, we discuss the integral damage factor, a descriptor that combines the power flux and the square of the irradiation time. In recent years, the scientific community involved in plasma-facing materials for nuclear fusion reactors has used this parameter to measure the equivalent material damage produced in experiments of various types with different types of radiation and wide ranges of power flux and irradiation time. The integral damage factor is useful in practice but lacks formal theoretical justification. In this simple model, we find that it is directly proportional to the maximum concentration of defects. © 2021 Author(s).es
dc.identifier.citationMatter and Radiation at ExtremesOpen AccessVolume 6, Issue 11 January 2021 Article number 015902es
dc.identifier.issn2468-2047
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/22667
dc.language.isoenes
dc.subjectEngineering controlled termses
dc.subjectIrradiationes
dc.subjectStochastic modelses
dc.subjectStochastic systemses
dc.subjectEngineering uncontrolled termses
dc.subjectAverage numberses
dc.subjectDamage factores
dc.subjectDefects formationes
dc.subjectExposed toes
dc.subjectExposure-timees
dc.subjectIrradiation timees
dc.subjectMaster equationses
dc.subjectPower fluxes
dc.subjectSimple modelinges
dc.subjectStochastic evolutiones
dc.subjectEngineering main headinges
dc.subjectDefectses
dc.titleA model for defect formation in materials exposed to radiationes
dc.typeArtículoes
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