Elucidation of the anomalous A = 9 isospin quartet behaviour
| Autor: | B. A. Brown, Maxime Brodeur, Alain Lapierre, T. Brunner, S. Ettenauer, Ryan Ringle, D. Lunney, Jens Dilling |
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| Přispěvatelé: | CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), 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) |
| Rok vydání: | 2012 |
| Předmět: |
IONS
Nuclear Theory ACCURACY General Physics and Astronomy FOS: Physical sciences [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 01 natural sciences Ion Nuclear physics Nuclear Theory (nucl-th) symbols.namesake 0103 physical sciences EQUATION Coulomb Nuclear Experiment (nucl-ex) HIGH-PRECISION 010306 general physics Multiplet Nuclear Experiment Physics NUCLEI 010308 nuclear & particles physics Penning trap 1P SHELL TITAN Excited state Isospin SHELL-MODEL symbols ATOMIC MASS EVALUATION Isobaric process Atomic physics Titan (rocket family) |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2012, 108, pp.212501. ⟨10.1103/PhysRevLett.108.212501⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.48550/arxiv.1204.4133 |
| Popis: | Recent high-precision mass measurements of $^{9}$Li and $^{9}$Be, 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 (IMME) behaviour 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 $^{9}$B and $^{9}$Be 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. Comment: 5 pages, 2 figures |
| Databáze: | OpenAIRE |
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