Precision mass measurements of magnesium isotopes and implications for the validity of the isobaric mass multiplet equation
| Autor: | A. Grossheim, Jens Lassen, Jason D. Holt, Michael E. Wieser, R. Klawitter, Sebastian Raeder, S. R. Stroberg, Daniel Burdette, Maxime Brodeur, Jens Dilling, Robert Thompson, Aaron Gallant, A. Teigelhöfer, H. Heggen, A. Lennarz, Catherine Nicoloff, Corina Andreoiu, O. M. Drozdowski, B.E. Schultz, Gerald Gwinner, U. Chowdhury, A. A. Kwiatkowski, K. G. Leach, A. Chaudhuri |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Mass excess Isotope 010308 nuclear & particles physics Isotopes of chlorine FOS: Physical sciences Penning trap 01 natural sciences Atomic mass 3. Good health Ab initio quantum chemistry methods 0103 physical sciences Präzisionsexperimente - Abteilung Blaum Nuclear Experiment (nucl-ex) Atomic physics 010306 general physics Nuclear Experiment Multiplet Isotopes of magnesium |
| Zdroj: | Physical Review C |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.96.034316 |
| Popis: | If the mass excess of neutron-deficient nuclei and their neutron-rich mirror partners are both known, it can be shown that deviations of the Isobaric Mass Multiplet Equation (IMME) in the form of a cubic term can be probed. Such a cubic term was probed by using the atomic mass of neutron-rich magnesium isotopes measured using the TITAN Penning trap and the recently measured proton-separation energies of $^{29}$Cl and $^{30}$Ar. The atomic mass of $^{27}$Mg was found to be within 1.6$\sigma$ of the value stated in the Atomic Mass Evaluation. The atomic masses of $^{28,29}$Mg were measured to be both within 1$\sigma$, while being 8 and 34 times more precise, respectively. Using the $^{29}$Mg mass excess and previous measurements of $^{29}$Cl we uncovered a cubic coefficient of $d$ = 28(7) keV, which is the largest known cubic coefficient of the IMME. This departure, however, could also be caused by experimental data with unknown systematic errors. Hence there is a need to confirm the mass excess of $^{28}$S and the one-neutron separation energy of $^{29}$Cl, which have both come from a single measurement. Finally, our results were compared to ab initio calculations from the valence-space in-medium similarity renormalization group, resulting in a good agreement. Comment: 7 pages, 3 figures |
| Databáze: | OpenAIRE |
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