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<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Subtraction method in the second random-phase approximation: First applications with a Skyrme energy functional</title>
<creator>Gambacurta, D.</creator>
<creator>Grasso, M.</creator>
<creator>Engel, J.</creator>
<contributor>Institut de Physique Nucléaire d'Orsay (IPNO) ; Université Paris-Sud - Paris 11 (UP11) - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Université de Guyane (UG) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>1 tex, 16 figures</description>
<description>International audience</description>
<source>ISSN: 0556-2813</source>
<source>EISSN: 1089-490X</source>
<source>Physical Review C</source>
<publisher>American Physical Society</publisher>
<identifier>in2p3-01193119</identifier>
<identifier>http://hal.in2p3.fr/in2p3-01193119</identifier>
<source>http://hal.in2p3.fr/in2p3-01193119</source>
<source>Physical Review C, American Physical Society, 2015, 92 (3), pp.034303. 〈10.1103/PhysRevC.92.034303〉</source>
<identifier>DOI : 10.1103/PhysRevC.92.034303</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevC.92.034303</relation>
<identifier>ARXIV : 1506.05975</identifier>
<relation>info:eu-repo/semantics/altIdentifier/arxiv/1506.05975</relation>
<language>en</language>
<subject>[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th]</subject>
<subject>[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We make use of a subtraction procedure, introduced to overcome double--counting problems in beyond--mean--field theories, in the second random--phase--approximation (SRPA) for the first time. This procedure guarantees the stability of SRPA (so that all excitation energies are real). We show that the method fits perfectly into nuclear density--functional theory. We illustrate applications to the monopole and quadrupole response and to low--lying $0^+$ and $2^+$ states in the nucleus $^{16}$O. We show that the subtraction procedure leads to: (i) results that are weakly cutoff dependent; (ii) a considerable reduction of the SRPA downwards shift with respect to the random--phase approximation (RPA) spectra (systematically found in all previous applications). This implementation of the SRPA model will allow a reliable analysis of the effects of 2 particle--2 hole configurations ($2p2h$) on the excitation spectra of medium--mass and heavy nuclei.</description>
<date>2015-09</date>
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