| Thème(s) : |
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Physique/Physique Nucléaire Expérimentale
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| Titre : |
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Elucidation of the Anomalous A=9 Isospin Quartet Behavior |
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| Auteur : |
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M. Brodeur, T. Brunner, S. Ettenauer, A. Lapierre, R. Ringle, B. A. Brown, D. Lunney1, J. Dilling |
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| Laboratoire : |
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| équipe(s) de recherche : |
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CSNSM SNO |
| Résumé : |
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Recent high-precision mass measurements of Li-9 and Be-9, performed with the TITAN Penning trap at the TRIUMF ISAC facility, are analyzed in light of state-of-the-art shell model calculations. We find an explanation for the anomalous isobaric mass multiplet equation behavior for the two A = 9 quartets. The presence of a cubic d = 6.3(17) keV term for the J(pi) = 3/2(-) quartet and the vanishing cubic term for the excited J(pi) = 1/2(-) multiplet depend upon the presence of a nearby T = 1/2 state in B-9 and Be-9 that induces isospin mixing. This is contrary to previous hypotheses involving purely Coulomb and charge-dependent effects. T = 1/2 states have been observed near the calculated energy, above the T = 3/2 state. However, an experimental confirmation of their J(pi) is needed. |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2012 |
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| Nom du périodique : |
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| Physical Review Letters (Phys. Rev. Lett.) |
| Publisher |
American Physical Society |
| ISSN |
0031-9007 (eISSN : 1079-7114) |
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| Volume : |
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108 |
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| Page/Article : |
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212501 |
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| Identifiant local : |
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CSNSM SNO |
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| Mot(s)-clé(s) : |
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ATOMIC MASS EVALUATION – HIGH-PRECISION – SHELL-MODEL – 1P SHELL – EQUATION – TITAN – ACCURACY – NUCLEI – IONS |
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