<?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>S0035-001X2021000500013</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.67.051201</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Shell model calculations of nuclear structure in &#8220;Island of inversion&#8221; N = 20 region: 32&#8722;36Mg isotopes]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Abu Kassim]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ahmed]]></surname>
<given-names><![CDATA[F. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Al-Sammarrae]]></surname>
<given-names><![CDATA[A. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sharrad]]></surname>
<given-names><![CDATA[F. I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garba]]></surname>
<given-names><![CDATA[L. G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,University of Malaya Faculty of Science Department of Physics]]></institution>
<addr-line><![CDATA[Kuala Lumpur ]]></addr-line>
<country>Malaysia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Diyala Faculty of Science Department of Physics]]></institution>
<addr-line><![CDATA[Diyala ]]></addr-line>
<country>Iraq</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,University of Samarra Faculty of Education Department of Physics]]></institution>
<addr-line><![CDATA[Selah Alden ]]></addr-line>
<country>Iraq</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,University of Karbala Faculty of Science Department of Computer Science]]></institution>
<addr-line><![CDATA[Karbala ]]></addr-line>
<country>Iraq</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Yusuf Maitama Sule University Faculty of Science Department of Physics]]></institution>
<addr-line><![CDATA[Kano ]]></addr-line>
<country>Nigeria</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<volume>67</volume>
<numero>5</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2021000500013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2021000500013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2021000500013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The intruder configurations (1p-1h), (2p-2h) and (3p-3h) were studied in this work for the island of inversion within the SDPF-U Hamiltonian. The effect of the proton locations on the structure (energies and transition probabilities) for even-even and even-odd magnesium (N=20-24) isotopes is studied. The unmixed intruder configurations (1p-1h), (2p-2h) and (3p-3h) in addition to the protons positions are created by restriction method. The proposed restricted configurations were applied to calculate the low-lying states and probabilities of the transitions B(E2 : 01+&#8594; 21+) with effective charges &#949;  p = 1.32 and &#949;  n = 0.421 for the  32,34,36 Mg isotopes and comparing to the results of available experimental works. The good agreement between the theoretical and experimental values confirmed the existence of the intruder configurations in these nuclei. The theoretical results showed a suitable SDPF-U Hamiltonian in the calculations for the structure of the nuclei in this region. The SDPF-U results confirmed many energy states and other suggested J values.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[SDPF-U Hamiltonian]]></kwd>
<kwd lng="en"><![CDATA[low-lying states]]></kwd>
</kwd-group>
</article-meta>
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