Browsing by Author "Rebeiro, B. M."

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    Nuclear structure studies relevant to ¹³⁶Xe ββ decay
    (IOP Publishing, 2018) Rebeiro, B. M.; Triambak, S.; Garrett, P. E.; Lindsay, R.; Adsley, P.; Ball, G. C.; Bildstein, V.; Burbadge, C.; Diaz-Varela, A.; Faestermann, T.; Hertenberger, R.; Jigmeddorj, B.; Kamil, M.; Leach, K. G.; Mabika, P. Z.; Nzobadila, J. C.; Orce, J. N.; Radich, A. J.; Rand, E.; Wirth, H. F.
    In these proceedings we briefly discuss preliminary results from ¹³⁸Ba(d, α) and ¹³⁸Ba(p, t) reactions performed using the Q3D magentic spectrometer at the Maier-Leibnitz- Laboratorium (MLL) tandem accelerator facility in Garching, Germany. Our results aim to provide useful spectroscopic information for the calculation of the ¹³⁶Xe →¹³⁶ Ba double beta decay matrix elements.
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    Second T = 3/2 state in 9B and the isobaric multiplet mass equation
    (American Physical Society, 2018) Mukwevho, N. J.; Rebeiro, B. M.; Marin-Lambarri, D. J.; Triambak, S.; Adsley, P.; Kheswa, N. Y.; Neveling, R.; Pellegri, L.; Pesudo, V.; Smit, F. D.; Akakpo, E. H.; Brümmer, J. W.; Jongile, S.; Kamil, M.; Mabika, P. Z.; Nemulodi, F.; Orce, J. N.; Papka, P.; Steyn, G. F.; Yahia-Cherif, W.
    Recent high-precision mass measurements and shell-model calculations [M. Brodeur et al., Phys. Rev. Lett. 108, 212501 (2012)] have challenged a longstanding explanation for the requirement of a cubic isobaric multiplet mass equation for the lowest A=9 isospin quartet. The conclusions relied upon the choice of the excitation energy for the second T=3/2 state in 9B, which had two conflicting measurements prior to this work. We remeasured the energy of the state using the 9Be(3He,t) reaction and significantly disagree with the most recent measurement. Our result supports the contention that continuum coupling in the most proton-rich member of the quartet is not the predominant reason for the large cubic term required for A=9 nuclei.