<?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>S0035-001X2019000200116</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.65.116</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Role of the cut-off function for the ground state variational wavefunction of the hydrogen atom confined by a hard sphere]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aquino]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Física ]]></institution>
<addr-line><![CDATA[Iztapalapa México D. F.]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>65</volume>
<numero>2</numero>
<fpage>116</fpage>
<lpage>123</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2019000200116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2019000200116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2019000200116&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A variational treatment of the hydrogen atom in its ground state, enclosed by a hard spherical cavity of radius Rc, is developed by considering the ansatz wavefunction as the product of the free-atom 1s orbital times a cut-off function to satisfy the Dirichlet boundary condition imposed by the impenetrable confining sphere. Seven different expressions for the cut-off function are employed to evaluate the energy, the cusp condition, the Shannon entropy,  &#10216;   r  - 1 &#10217;,  &#10216; r &#10217;,  &#10216;   r  2 &#10217;, and the critical cage radius, as a function of    R  c in each case. We investigate which of the proposed cut-off functions provides best agreement with available corresponding exact calculations for the above quantities. We find that most of these cut-off functions work better in certain regions of    R  c, while others are identified to give bad results in general. The cut-off functions that give, on average, better results are of the form  ( 1 - ( r /   R  c   )  n ),  n = 1, 2, 3.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Confined hydrogen atom]]></kwd>
<kwd lng="en"><![CDATA[cut-off function]]></kwd>
<kwd lng="en"><![CDATA[Dirichlet boundary conditions]]></kwd>
<kwd lng="en"><![CDATA[31.15.B]]></kwd>
<kwd lng="en"><![CDATA[31.15.ac]]></kwd>
<kwd lng="en"><![CDATA[31.15.xt]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Michels]]></surname>
<given-names><![CDATA[J. De Boer]]></given-names>
</name>
<name>
<surname><![CDATA[Bijl]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Physica]]></source>
<year>1937</year>
<volume>4</volume>
</nlm-citation>
</ref>
<ref id="B2">
<label>2.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aquino]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Advances in Quantum Chemistry]]></source>
<year>2009</year>
<volume>57</volume>
</nlm-citation>
</ref>
<ref id="B3">
<label>3.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gorecki]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Byers Brown]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B: At. Mol. Opt. Phys.]]></source>
<year>1987</year>
<volume>20</volume>
</nlm-citation>
</ref>
<ref id="B4">
<label>4.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gorecki]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Byers Brown]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B: At. Mol. Opt. Phys.]]></source>
<year>1989</year>
<volume>22</volume>
</nlm-citation>
</ref>
<ref id="B5">
<label>5.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marín]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Cruz]]></surname>
<given-names><![CDATA[S. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B: At. Opt. Phys.]]></source>
<year>1991</year>
<volume>24</volume>
<page-range>2899-907</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Varshni]]></surname>
<given-names><![CDATA[Y.P.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B: At. Mol. Opt. Phys.]]></source>
<year>1997</year>
<volume>30</volume>
</nlm-citation>
</ref>
<ref id="B7">
<label>7.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ludeña]]></surname>
<given-names><![CDATA[E. V.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Phys.]]></source>
<year>1977</year>
<volume>66</volume>
</nlm-citation>
</ref>
<ref id="B8">
<label>8.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sarsa]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Buendía]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Gálvez]]></surname>
<given-names><![CDATA[F. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B: At. Mol. Opt. Phys.]]></source>
<year>2014</year>
<volume>47</volume>
</nlm-citation>
</ref>
<ref id="B9">
<label>9.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aquino]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. J. Quantum Chem.]]></source>
<year>1995</year>
<volume>54</volume>
</nlm-citation>
</ref>
<ref id="B10">
<label>10.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aquino]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Campoy]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Montgomery]]></surname>
<given-names><![CDATA[H. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. J. Quantum Chem.]]></source>
<year>2007</year>
<volume>107</volume>
</nlm-citation>
</ref>
<ref id="B11">
<label>11.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harrison]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Quantum Wells, Wires and Dots: Theoretical and Computational Physics of Semiconductor Nanostructures]]></source>
<year>2005</year>
<edition>2a Ed</edition>
<publisher-name><![CDATA[John Wiley and Sons, Ltd.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<label>12.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chakraborty]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Quantum Dots: A survey of the properties of artificial atoms]]></source>
<year>1999</year>
<publisher-name><![CDATA[Elsevier]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<label>13.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández-Rojas]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bretón]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gomez Llorente]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Phys.]]></source>
<year>1996</year>
<volume>104</volume>
</nlm-citation>
</ref>
<ref id="B14">
<label>14.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhu]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. B]]></source>
<year>1994</year>
<volume>50</volume>
</nlm-citation>
</ref>
<ref id="B15">
<label>15.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Corson]]></surname>
<given-names><![CDATA[E. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Kaplan]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev.]]></source>
<year>1947</year>
<volume>71</volume>
</nlm-citation>
</ref>
<ref id="B16">
<label>16.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Goldman]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Joslin]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. Chem.]]></source>
<year>1992</year>
<volume>96</volume>
</nlm-citation>
</ref>
<ref id="B17">
<label>17.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Friedman]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Rabinovitch]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Thieberger]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Comp. Phys.]]></source>
<year>1979</year>
<volume>33</volume>
</nlm-citation>
</ref>
<ref id="B18">
<label>18.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Swenson]]></surname>
<given-names><![CDATA[R. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Danforth]]></surname>
<given-names><![CDATA[S. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Phys.]]></source>
<year>1972</year>
<volume>57</volume>
</nlm-citation>
</ref>
<ref id="B19">
<label>19.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sech]]></surname>
<given-names><![CDATA[Le]]></given-names>
</name>
<name>
<surname><![CDATA[Banerjee]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B: At. Mol. Opt. Phys.]]></source>
<year>2011</year>
<volume>44</volume>
</nlm-citation>
</ref>
<ref id="B20">
<label>20.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Banerjee]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Kamal]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Chowdhury]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Lett. A]]></source>
<year>2006</year>
<volume>350</volume>
</nlm-citation>
</ref>
<ref id="B21">
<label>21.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Griffiths]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Introduction to Quantum Mechanics]]></source>
<year>1995</year>
<publisher-name><![CDATA[Prentice Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<label>22.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Saxon]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Elementos de Mecánica Cuántica]]></source>
<year>1968</year>
<publisher-name><![CDATA[Ed. Easo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<label>23.</label><nlm-citation citation-type="book">
<collab>Arfken</collab>
<source><![CDATA[Mathematical Methods for Physicists]]></source>
<year>1985</year>
<edition>3&#8203;a Ed.</edition>
<publisher-name><![CDATA[Academic Press Inc.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<label>24.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yamashita]]></surname>
<given-names><![CDATA[M. T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Brasileira de Ensino de Fisica]]></source>
<year>2008</year>
<volume>30</volume>
</nlm-citation>
</ref>
<ref id="B25">
<label>25.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tesis de Maestría]]></source>
<year>2014</year>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana-Iztapalapa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<label>26.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Davydov]]></surname>
<given-names><![CDATA[A. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Quantum Mechanics]]></source>
<year>1965</year>
<publisher-name><![CDATA[Pergamon Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<label>27.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gadre]]></surname>
<given-names><![CDATA[S. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Sears]]></surname>
<given-names><![CDATA[S. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Chakravorty]]></surname>
<given-names><![CDATA[S. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bendale]]></surname>
<given-names><![CDATA[R. D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. A]]></source>
<year>1985</year>
<volume>32</volume>
</nlm-citation>
</ref>
<ref id="B28">
<label>28.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hô]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sagar]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Smith Jr.]]></surname>
<given-names><![CDATA[V. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Esquivel]]></surname>
<given-names><![CDATA[R. O.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B: At. Mol. Opt. Phys.]]></source>
<year>1994</year>
<volume>27</volume>
</nlm-citation>
</ref>
<ref id="B29">
<label>29.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jaynes]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Papers on Probability Statistics and Statistical Physics]]></source>
<year></year>
<publisher-loc><![CDATA[Dordrecht: Reidel ]]></publisher-loc>
<publisher-name><![CDATA[Ed. Rosencrantz]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<label>30.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sommerfeld]]></surname>
<given-names><![CDATA[V. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Welker]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Annalen der Physik]]></source>
<year>1938</year>
<volume>5</volume>
</nlm-citation>
</ref>
<ref id="B31">
<label>31.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Suryanarayana]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Weil]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Phys.]]></source>
<year>1976</year>
<volume>64</volume>
</nlm-citation>
</ref>
<ref id="B32">
<label>32.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aquino]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Flores-Riveros]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Rivas-Silva]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Lett. A]]></source>
<year>2013</year>
<volume>377</volume>
</nlm-citation>
</ref>
<ref id="B33">
<label>33.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ley-Koo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Rubinstein]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Phys.]]></source>
<year>1979</year>
<volume>71</volume>
</nlm-citation>
</ref>
<ref id="B34">
<label>34.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Varshni]]></surname>
<given-names><![CDATA[Y. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Phys. B]]></source>
<year>1998</year>
<volume>31</volume>
</nlm-citation>
</ref>
<ref id="B35">
<label>35.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Garza]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Vela]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. E]]></source>
<year>1998</year>
<volume>58</volume>
</nlm-citation>
</ref>
<ref id="B36">
<label>36.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montgomery]]></surname>
<given-names><![CDATA[H. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Jr. Int. J. Mol. Sci.]]></source>
<year>2001</year>
<volume>2</volume>
</nlm-citation>
</ref>
<ref id="B37">
<label>37.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ley-Koo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Advances in Quantum Chem.]]></source>
<year>2009</year>
<volume>57</volume>
</nlm-citation>
</ref>
<ref id="B38">
<label>38.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Groot]]></surname>
<given-names><![CDATA[S. R. de]]></given-names>
</name>
<name>
<surname><![CDATA[Seldam]]></surname>
<given-names><![CDATA[C. A. ten]]></given-names>
</name>
</person-group>
<source><![CDATA[Physica]]></source>
<year>1946</year>
<volume>XII</volume>
</nlm-citation>
</ref>
<ref id="B39">
<label>39.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fowler]]></surname>
<given-names><![CDATA[P. W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Mol. Phys.]]></source>
<year>1984</year>
<volume>53</volume>
</nlm-citation>
</ref>
<ref id="B40">
<label>40.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sen]]></surname>
<given-names><![CDATA[K. D.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Phys.]]></source>
<year>2005</year>
<volume>122</volume>
</nlm-citation>
</ref>
<ref id="B41">
<label>41.</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montgomery Jr.]]></surname>
<given-names><![CDATA[H. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Aquino]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Sen]]></surname>
<given-names><![CDATA[K. D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. Journal of Quantum Chem.]]></source>
<year>2007</year>
<volume>107</volume>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
