On The Influence Of Etch Pits In The Overall Dissolution Rate Of Apatite Basal Sections

dc.creatorAlencar
dc.creatorIgor; Guedes
dc.creatorSandro; Palissari
dc.creatorRosane; Hadler
dc.creatorJulio C.
dc.date2015-SEP
dc.date2016-06-07T13:20:28Z
dc.date2016-06-07T13:20:28Z
dc.date.accessioned2018-03-29T01:40:30Z
dc.date.available2018-03-29T01:40:30Z
dc.identifier
dc.identifierOn The Influence Of Etch Pits In The Overall Dissolution Rate Of Apatite Basal Sections. Springer, v. 42, p. 629-640 SEP-2015.
dc.identifier0342-1791
dc.identifierWOS:000360757300001
dc.identifier10.1007/s00269-015-0749-6
dc.identifierhttp://link.springer.com/article/10.1007%2Fs00269-015-0749-6
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/242896
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1306594
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionDetermination of efficiencies for particle detection plays a central role for proper estimation of reaction rates. If chemical etching is employed in the revelation of latent particle tracks in solid-state detectors, dissolution rates and etchable lengths are important factors governing the revelation and observation. In this work, the mask method, where a reference part of the sample is protected during dissolution, was employed to measure step heights in basal sections of apatite etched with a nitric acid, HNO, solution at a concentration of 1.1 M and a temperature of 20 A degrees C. We show a drastic increase in the etching velocity as the number of etch pits in the surface augments, in accordance with the dissolution stepwave model, where the outcrop of each etch pit generates a continuous sequence of stepwaves. The number of etch pits was varied by irradiation with neutrons and perpendicularly incident heavy ions. The size dependence of the etch-pit opening with etching duration for ion (200-300 MeV Sm-152 and U-238) tracks was also investigated. There is no distinction for the etch pits between the different ions, and the dissolution seems to be governed by the opening velocity when a high number of etch pits are present in the surface. Measurements of the etchable lengths of these ion tracks show an increase in these lengths when samples are not pre-annealed before irradiation. We discuss the implications of these findings for fission-track modelling.
dc.description42
dc.description8
dc.description
dc.description629
dc.description640
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCNPq [141705/2008-6, 201847/2009-4]
dc.description
dc.description
dc.description
dc.languageen
dc.publisherSPRINGER
dc.publisher
dc.publisherNEW YORK
dc.relationPHYSICS AND CHEMISTRY OF MINERALS
dc.rightsfechado
dc.sourceWOS
dc.subjectFission Decay Constant
dc.subjectNeutron-fluence Measurements
dc.subjectMetal-activation Monitors
dc.subjectTrack Annealing Kinetics
dc.subjectExternal Detector
dc.subjectFrequency-distributions
dc.subjectInduced Amorphization
dc.subjectCrystal Dissolution
dc.subjectRaman-spectroscopy
dc.subjectStandard Glasses
dc.titleOn The Influence Of Etch Pits In The Overall Dissolution Rate Of Apatite Basal Sections
dc.typeArtículos de revistas


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