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**Nota de Física****Publicado**

# **Influence of low-lying Discrete Nuclear States on Isotopic Abundances in Presupernova Cores**

**A. Dimarco; C. Barbero; H. Dias; F. Garcia; J. Horvath; L. Losano**

2001

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## **Datos de la publicación**

<dl>

<dt>Autores</dt>
<dd>A. Dimarco; C. Barbero; H. Dias; F. Garcia; J. Horvath; L. Losano</dd>

<dt>Tipo</dt>
<dd>Nota de Física</dd>

<dt>Estado</dt>
<dd>Publicado</dd>

<dt>Fecha de publicación</dt>
<dd>2001</dd>

<dt>Descripción</dt>
<dd>The influence of low-lying discrete nuclear states on isotopic abundances in presupernova core is discussed. Assuming the hypothesis of nuclear statistical equlibrium (NSE) the Saha equation has been solved for a set of 65 nuclear species (including free protons and neutrons). Experimental data have been used in the calculation of the first terms of the nuclear partition function. The obtained abundances are compared with those evaluated using an energy level density in the computation of the nuclear partition function. We conclude that in future calculations involving isotopic abundances in presupernova core, the low-lying nuclear states need to be treated as discrete ones, when experimental data are available.</dd>

<dt>Año</dt>
<dd>2001</dd>

<dt>Número</dt>
<dd>CBPF-NF-062/01</dd>

<dt>Vínculo con tesis</dt>
<dd>No</dd>

<dt>Vínculo con beca</dt>
<dd>No</dd>

</dl>

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```

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