<?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>S0035-001X2011000700011</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Long term indoor radon measurements in the pelletron laboratory at the UNAM physics institute]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Golzarri]]></surname>
<given-names><![CDATA[J.I.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lopez]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rickards]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Física ]]></institution>
<addr-line><![CDATA[México D.F]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2011</year>
</pub-date>
<volume>57</volume>
<fpage>50</fpage>
<lpage>54</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2011000700011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2011000700011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2011000700011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The results of six months of continuous measurement of the indoor radon concentration levels in the building where the Instituto de Física 3 MV Pelletron particle accelerator is located are presented. This study has three major objectives: (a) to know the actual values of the levels of indoor radon in this installation, where personnel spend many hours and sometimes days; (b) assess the radiological risk from radon inhalation for personnel working permanently in the laboratory, as well as incidental users; and (c) establish, if necessary, time limits for continuous permanence on the location for indoor radon exposure. Passive nuclear track detectors and dynamic systems were employed, covering six months (August, 2009 to January, 2010). For the calculation of internal dose the "Radon Individual Dose Calculator" was used. The results indicate that the indoor radon levels are below the USEPA recommended levels (400 Bq/m³) in workplaces. The measurements help to establish levels for workplaces in México.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este trabajo se presentan los resultados de seis meses de mediciones constantes del nivel de concentración de radón intramuros en el edificio donde se encuentra albergado el acelerador de partículas Pelletron. El estudio tiene tres objetivos básicos: (a) el de tener los valores reales del contenido de radón intramuros en esta instalación, donde académicos y técnicos pasan muchas horas, y a veces hasta días enteros; (b) evaluar el riesgo radiológico por inhalación de radón que tienen tanto el personal que labora directamente en el Pelletron, así como los usuarios eventuales; y (c) establecer, de ser necesario, los límites de tiempo de estancia continua dentro de las instalaciones establecidas para radón intramuros en lugares de trabajo. Para realizar este estudio, se usaron detectores pasivos de "Trazas Nucleares en Sólidos (TNS)" y sistemas dinámicos, abarcando seis meses (agosto del 2009 a enero del 2010). Para el cálculo de dosis interna se utilizó un algoritmo de cálculo de dosis de radón individual. Los resultados indican, a diferencia con otras instituciones y laboratorios, que los niveles de radón intramuros están por debajo de los niveles recomendados por la agencia USEPA (400 Bq/m³) para lugares de trabajo. Este estudio también puede ayudar a establecer estos niveles para lugares de trabajo en México.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Indoor radon]]></kwd>
<kwd lng="en"><![CDATA[radon]]></kwd>
<kwd lng="en"><![CDATA[workplaces]]></kwd>
<kwd lng="en"><![CDATA[risk]]></kwd>
<kwd lng="en"><![CDATA[pelletron]]></kwd>
<kwd lng="es"><![CDATA[Radón intramuros]]></kwd>
<kwd lng="es"><![CDATA[lugares de trabajo]]></kwd>
<kwd lng="es"><![CDATA[riesgo radiológico]]></kwd>
<kwd lng="es"><![CDATA[peletrón]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>Long term indoor radon measurements in the pelletron laboratory at the UNAM physics institute</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>G. Espinosa<sup>*</sup>, J.I. Golzarri, K. Lopez, and J. Rickards</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Instituto de F&iacute;sica, Universidad Nacional Aut&oacute;noma de M&eacute;xico, Apartado Postal 20&#150;364 M&eacute;xico, D.F. 01000, M&eacute;xico, </i>*e&#150;mail: <a href="mailto:espinosa@fisica.unam.mx">espinosa@fisica.unam.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 10 de marzo de 2010    <br>   Aceptado el 31 de agosto de 2010</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>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">The results of six months of continuous measurement of the indoor radon concentration levels in the building where the Instituto de F&iacute;sica 3 MV Pelletron particle accelerator is located are presented. This study has three major objectives: (a) to know the actual values of the levels of indoor radon in this installation, where personnel spend many hours and sometimes days; (b) assess the radiological risk from radon inhalation for personnel working permanently in the laboratory, as well as incidental users; and (c) establish, if necessary, time limits for continuous permanence on the location for indoor radon exposure.</font></p>     <p align="justify"><font face="verdana" size="2">Passive nuclear track detectors and dynamic systems were employed, covering six months (August, 2009 to January, 2010). For the calculation of internal dose the "Radon Individual Dose Calculator" was used. The results indicate that the indoor radon levels are below the USEPA recommended levels (400 Bq/m<sup>3</sup>) in workplaces. The measurements help to establish levels for workplaces in M&eacute;xico.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Indoor radon; radon; workplaces; risk; pelletron.</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">En este trabajo se presentan los resultados de seis meses de mediciones constantes del nivel de concentraci&oacute;n de rad&oacute;n intramuros en el edificio donde se encuentra albergado el acelerador de part&iacute;culas Pelletron. El estudio tiene tres objetivos b&aacute;sicos: (a) el de tener los valores reales del contenido de rad&oacute;n intramuros en esta instalaci&oacute;n, donde acad&eacute;micos y t&eacute;cnicos pasan muchas horas, y a veces hasta d&iacute;as enteros; (b) evaluar el riesgo radiol&oacute;gico por inhalaci&oacute;n de rad&oacute;n que tienen tanto el personal que labora directamente en el Pelletron, as&iacute; como los usuarios eventuales; y (c) establecer, de ser necesario, los l&iacute;mites de tiempo de estancia continua dentro de las instalaciones establecidas para rad&oacute;n intramuros en lugares de trabajo.</font></p>     <p align="justify"><font face="verdana" size="2">Para realizar este estudio, se usaron detectores pasivos de "Trazas Nucleares en S&oacute;lidos (TNS)" y sistemas din&aacute;micos, abarcando seis meses (agosto del 2009 a enero del 2010). Para el c&aacute;lculo de dosis interna se utiliz&oacute; un algoritmo de c&aacute;lculo de dosis de rad&oacute;n individual. Los resultados indican, a diferencia con otras instituciones y laboratorios, que los niveles de rad&oacute;n intramuros est&aacute;n por debajo de los niveles recomendados por la agencia USEPA (400 Bq/m<sup>3</sup>) para lugares de trabajo. Este estudio tambi&eacute;n puede ayudar a establecer estos niveles para lugares de trabajo en M&eacute;xico.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Rad&oacute;n intramuros; lugares de trabajo; riesgo radiol&oacute;gico; peletr&oacute;n.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 87.56.bg; 91.67.Qr; 61.80.&#150;x; 29.40.&#150;n.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v57s1/v57s1a11.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>Acknowledgments</b></font></p>     <p align="justify"><font face="verdana" size="2">The authors thanks to F.J. Jaimes&#150;Beristain, J. Mart&iacute;nez, N. Gonzalez, P. Carrasco, A. Garc&iacute;a and D. Aguilar, for their technical help. This work was partially supported by PAPIIT&#150;DGAPA&#150;UNAM project 1N101910.</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. <u>USEPA, 2004</u>. US EPA, Environments Division (6609J). <i>A Citizen's Guide to Radon: the Guide to protecting yourself and your family from radon </i>(Washington, DC 20460 US EPA 402&#150;K&#150;02&#150;006).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8373374&pid=S0035-001X201100070001100001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">2. ICRP 1994. <i>International Commission on Radiological Protection, </i>Protection Against Radon&#150;222 at Home and at Work, Publication 65, Annals of the ICRP Volume 23/2, ISBN&#150;13: 978&#150;0&#150;08&#150;042475&#150;0, ISBN&#150;10: 0&#150;08&#150;042475&#150;9.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8373376&pid=S0035-001X201100070001100002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">3. EUROTOM (1996) Council directive 96/29/EURATOM of 13 May 1996, laying down basic safety standards for the protection of the health of workers and the general public against the dangerous arising from ionizing radiation. <a href="http://ec.europa.eu/energy/nuclear/radioprotection/doc/legislation/9629en.pdf" target="_blank">http://ec.europa.eu/energy/nuclear/radioprotection/doc/legislation/9629en.pdf</a> (consulted 05/02/2010)</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8373378&pid=S0035-001X201100070001100003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">4. G. Espinosa, J.I. Golzarri, A. Angeles, and R.V. Griffith. <i>Radiat. Meas. </i><b>44</b> (2009) 1051.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8373379&pid=S0035-001X201100070001100004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">5. G. Espinosa and R.B. Gammage, <i>Prot. Dosimetry </i><b>85</b> (1999) 325.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8373381&pid=S0035-001X201100070001100005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">6. N. Kavasi, <i>et al., Radiat. Meas. </i><b>41</b> (2006) 229.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8373383&pid=S0035-001X201100070001100006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">7. G.M. Kendall, B.M.R. Green, J.C.H. Miles, and D.W. Dixon, <i>J. Radiol. Prot. </i><b>25</b> (2005) 475.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8373385&pid=S0035-001X201100070001100007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     ]]></body>
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