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26 April 2024 |
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Precision mass measurements of magnesium isotopes and implications on the validity of the Isobaric Mass Multiplet Equation | | M. Brodeur
; A.A. Kwiatkowski
; O.M. Drozdowski
; C. Andreoiu
; D. Burdette
; A. Chaudhuri
; U. Chowdhury
; A.T. Gallant
; A. Grossheim
; G. Gwinner
; H. Heggen
; J.D. Holt
; R. Klawitter
; J. Lassen
; K.G. Leach
; A. Lennarz
; C. Nicoloff
; S. Raeder
; B.E. Schultz
; S.R. Stroberg
; A. Teigelhofer
; R. Thompson
; M. Wieser
; J. Dilling
; | | Date: |
24 Jul 2017 | | Abstract: | 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. | | Source: | arXiv, 1707.7714 | | Services: | Forum | Review | PDF | Favorites | |
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