<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2011000200009</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A generalized rule of average for glow peak temperature of ternary alkali halide systems]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moroyoqui-Estrella]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Salas]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodriguez-Mijangos]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Sonora  ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Sonora Departamento de Investigación en Física ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2011</year>
</pub-date>
<volume>57</volume>
<numero>2</numero>
<fpage>154</fpage>
<lpage>157</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2011000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2011000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2011000200009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The anion composition dependence of the characteristic glow peak temperature of europium doped KCl0.50KBr0.25RbX0.25:Eu2+ (X=Cl, Br) mixed crystals are studied. Each material shows a thermoluminescence glow curve consisting of two main glow peaks with a temperature is between KCl:Eu2+ and KBr:Eu2+. The most intense is related to the F center destruction as occur in the case of KCl:Eu2+ crystals and its characteristic temperature depends strongly on the halogen composition. This behavior confirms that the temperature of the F-H centers recombination in this type of materials depends more on the proportion of anions. From these results, a generalized rule to obtain the temperature from averaging the characteristic temperature as function of the composition is discussed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se estudia la dependencia de la temperatura en la curva de brillo con la composición de los aniones en mezclas cristalinas impurificadas con Europio: KCl0.50KBr0.25RbX0.25:Eu2+ (X = Cl, Br). Cada material muestra una curva de brillo termoluminiscente consistente en dos picos de brillo principales con temperatura entre la del KCl:Eu2+ y la del KBr:Eu2+. El pico más intenso está relacionado con la destrucción del centro F, como ocurre en el caso de cristales de KCl:Eu2+ y su temperatura característica depende fuertemente de la composición del halogeno. El comportamiento confirma que la temperatura de la recombinación de los centros F-H en este tipo de materiales depende en gran medida de la proporción de los aniones. De estos resultados se propone una regla generalizada para obtener la temperatura, promediando la temperatura característica en función de la composición.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Defects in solids]]></kwd>
<kwd lng="en"><![CDATA[ternary solid solutions]]></kwd>
<kwd lng="en"><![CDATA[thermoluminescence]]></kwd>
<kwd lng="en"><![CDATA[color centers]]></kwd>
<kwd lng="es"><![CDATA[Defectos en sólidos]]></kwd>
<kwd lng="es"><![CDATA[soluciones sólidas ternarias]]></kwd>
<kwd lng="es"><![CDATA[termoluminiscencia]]></kwd>
<kwd lng="es"><![CDATA[centros de color]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>A generalized rule of average for glow peak temperature of ternary alkali halide systems</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>G. Moroyoqui&#150;Estrella&ordf;<sup>,b</sup>, R. P&eacute;rez&#150;Salas<sup>b</sup>, and R. Rodriguez&#150;Mijangos<sup>b*</sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>&ordf; Programa de Posgrado en F&iacute;sica, Universidad de Sonora,<i> Apartado Postal 5&#150;88, Hermosillo, Sonora, 83190, M&eacute;xico</i></i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b</sup> Departamento de Investigaci&oacute;n en F&iacute;sica, Universidad de Sonora, Apartado Postal 5&#150;88, Hermosillo, Sonora, 83190, M&eacute;xico, </i>* e&#150;mail: <a href="mailto:mijangos@cajeme.cifus.uson.mx">mijangos@cajeme.cifus.uson.mx</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 27 de septiembre de 2010    ]]></body>
<body><![CDATA[<br> Aceptado el 24 de enero de 2011</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">The anion composition dependence of the characteristic glow peak temperature of europium doped KCl<sub>0.50</sub>KBr<sub>0.25</sub>RbX<sub>0.25</sub>:Eu<sup>2+</sup> (X=Cl, Br) mixed crystals are studied. Each material shows a thermoluminescence glow curve consisting of two main glow peaks with a temperature is between KCl:Eu<sup>2+</sup> and KBr:Eu<sup>2+</sup>. The most intense is related to the F center destruction as occur in the case of KCl:Eu<sup>2+</sup> crystals and its characteristic temperature depends strongly on the halogen composition. This behavior confirms that the temperature of the F&#150;H centers recombination in this type of materials depends more on the proportion of anions. From these results, a generalized rule to obtain the temperature from averaging the characteristic temperature as function of the composition is discussed.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords:  </b>Defects in solids; ternary solid solutions; thermoluminescence; color centers.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Se estudia la dependencia de la temperatura en la curva de brillo con la composici&oacute;n de los aniones en mezclas cristalinas impurificadas con Europio:  KCl<sub>0.50</sub>KBr<sub>0.25</sub>RbX<sub>0.25</sub>:Eu<sup>2+</sup> (X = Cl, Br). Cada material muestra una curva de brillo termoluminiscente consistente en dos picos de brillo principales con temperatura entre la del KCl:Eu<sup>2+</sup> y la del KBr:Eu<sup>2+</sup>. El pico m&aacute;s intenso est&aacute; relacionado con la destrucci&oacute;n del centro F, como ocurre en el caso de cristales de KCl:Eu<sup>2+</sup> y su temperatura caracter&iacute;stica depende fuertemente de la composici&oacute;n del halogeno. El comportamiento confirma que la temperatura de la recombinaci&oacute;n de los centros F&#150;H en este tipo de materiales depende en gran medida de la proporci&oacute;n de los aniones. De estos resultados se propone una regla generalizada para obtener la temperatura, promediando la temperatura caracter&iacute;stica en funci&oacute;n de la composici&oacute;n.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Defectos en s&oacute;lidos; soluciones s&oacute;lidas ternarias; termoluminiscencia; centros de color.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">PACS: 78.20 Nv; 78.40 Ha; 78.60 Kn; 78.90 +t</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v57n2/v57n2a9.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Acknowledgements</b></font></p>     <p align="justify"><font face="verdana" size="2">We are grateful to Dr. Hector Riveros from Instituto de F&iacute;sica, UNAM for growing the crystals and M.S. Abraham Mendoza Cordova from Departamento de Geolog&iacute;a, UNISON for obtaining the diffraction measurement. This work has been partially supported by CONACYT under projet123952, PIFI&#150;2009 and P/MAA&#150;2009&#150;18.</font></p>     <p align="justify"><font face="verdana" size="2">IN MEMORIAN of Dr. Jose Luis Marin Flores (Ph D in Physics and Ph D in Physiology). He was a magnificent teacher who introduced many students to the application of mathematical methods in Physics as well as being a lucid investigator full of new ideas. He was also a person of great human warmth who was always willing to stand up for worthy social causes.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. M. Niki <i>etal., Phys. Rev. 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