<?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>S0035-001X2008000300006</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Nuclear structure for the isotopes ³He and 4He in k+N scattering]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arceo]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Física y Matemáticas Centro de Investigación y Desarrollo del Estado de Michoacán]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2008</year>
</pub-date>
<volume>54</volume>
<numero>3</numero>
<fpage>208</fpage>
<lpage>214</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2008000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2008000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2008000300006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The study of the nuclear structure of ³He and 4He was performed by using K+N phase shifts at incident energies up to 900 MeV. The analysis and comparison with previous experiments and theoretical results were made, obtaining better results with high precision.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[El estudio de la estructura nuclear para los elementos ³He and 4He ha sido realizada usando cambios de fase para la reaccion K+N a intervalos de energía hasta 900 MeV. El analisis y comparación con previos resultados experimentales y teóricos ha sido realizado, obteniendo mejores resultados con alta precisión.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Charge distribution]]></kwd>
<kwd lng="en"><![CDATA[elastic and inelastic scattering]]></kwd>
<kwd lng="en"><![CDATA[kaon-induced reactions]]></kwd>
<kwd lng="es"><![CDATA[Distribución de la carga]]></kwd>
<kwd lng="es"><![CDATA[dispersión elástica e inelástica]]></kwd>
<kwd lng="es"><![CDATA[reacciones del kaon-inducida]]></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>Nuclear structure for the isotopes <sup>3</sup>He and <sup>4</sup>He in k<sup>+</sup>N scattering</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>R. Arceo</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Centro de Investigaci&oacute;n y Desarrollo del Estado de Michoac&aacute;n. Morelia, Michoac&aacute;n 58060, M&eacute;xico. Escuela Superior de F&iacute;sica y Matem&aacute;ticas, Instituto Polit&eacute;cnico Nacional, Edificio 9, 07738 M&eacute;xico D.F., M&eacute;xico.</i> e&#150;mail: <a href="mailto:rarceo@nmsu.edu">rarceo@nmsu.edu</a>.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 15 de octubre de 2007    <br>   Aceptado el 3 de abril de 2008</font></p>     ]]></body>
<body><![CDATA[<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 study of the nuclear structure of <sup>3</sup>He and <sup>4</sup>He was performed by using K<sup>+</sup>N phase shifts at incident energies up to 900 MeV. The analysis and comparison with previous experiments and theoretical results were made, obtaining better results with high precision.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Charge distribution; elastic and inelastic scattering; kaon&#150;induced reactions</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">El estudio de la estructura nuclear para los elementos <sup>3</sup>He and <sup>4</sup>He ha sido realizada usando cambios de fase para la reaccion K<sup>+</sup>N a intervalos de energ&iacute;a hasta 900 MeV. El analisis y comparaci&oacute;n con previos resultados experimentales y te&oacute;ricos ha sido realizado, obteniendo mejores resultados con alta precisi&oacute;n.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Distribuci&oacute;n de la carga, dispersi&oacute;n el&aacute;stica e inel&aacute;stica; reacciones del kaon&#150;inducida. </font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 21.10.Ft,25.55.Ci,25.80.Nv</font></p>     ]]></body>
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