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Second T=3/2 state in B9 and the isobaric multiplet mass equation

N. J. Mukwevho, B. M. Rebeiro, D. J. Marín-Lámbarri, S. Triambak, P. Adsley, N. Y. Kheswa, R. Neveling, L. Pellegri, V. Pesudo, F. D. Smit, E. H. Akakpo, J. W. Brümmer, S. Jongile, M. Kamil, P. Z. Mabika, F. Nemulodi, J. N. Orce, P. Papka, G. F. Steyn, and W. Yahia-Cherif
Phys. Rev. C 98, 051302(R) – Published 26 November 2018

Abstract

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 B9, which had two conflicting measurements prior to this work. We remeasured the energy of the state using the Be9(He3,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.

  • Figure
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  • Received 21 February 2018
  • Revised 8 June 2018

DOI:https://doi.org/10.1103/PhysRevC.98.051302

©2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

N. J. Mukwevho1, B. M. Rebeiro1, D. J. Marín-Lámbarri1,2, S. Triambak1,*, P. Adsley3,2, N. Y. Kheswa2, R. Neveling2, L. Pellegri4,2, V. Pesudo1,2, F. D. Smit2, E. H. Akakpo1, J. W. Brümmer3, S. Jongile1,5, M. Kamil1, P. Z. Mabika1,5, F. Nemulodi2, J. N. Orce1, P. Papka3,2, G. F. Steyn2, and W. Yahia-Cherif6,2

  • 1Department of Physics and Astronomy, University of the Western Cape, P/B X17, Bellville 7535, South Africa
  • 2iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
  • 3Department of Physics, University of Stellenbosch, Private Bag X1, 7602 Matieland, South Africa
  • 4School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
  • 5Department of Physics, University of Zululand, Private Bag X1001, KwaDlangezwa 3886, South Africa
  • 6Université des Sciences et de la Technologie Houari Boumediene (USTHB), Faculté de Physique, B.P. 32 El-Alia, 16111 Bab Ezzouar, Algiers, Algeria

  • *striambak@uwc.ac.za

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Issue

Vol. 98, Iss. 5 — November 2018

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