Probing the N = 14 subshell closure: g factor of the Mg26(21 +) state

B. P. McCormick, A. E. Stuchbery*, T. Kibédi, G. J. Lane, M. W. Reed, T. K. Eriksen, S. S. Hota, B. Q. Lee, N. Palalani

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    The first-excited state g factor of 26Mg has been measured relative to the g factor of the Mg24(21 +) state using the high-velocity transient-field technique, giving g=+0.86±0.10. This new measurement is in strong disagreement with the currently adopted value, but in agreement with the sd-shell model using the USDB interaction. The newly measured g factor, along with E(21 +) and B(E2) systematics, signal the closure of the νd5/2 subshell at N=14. The possibility that precise g-factor measurements may indicate the onset of neutron pf admixtures in first-excited state even–even magnesium isotopes below 32Mg is discussed and the importance of precise excited-state g-factor measurements on sd shell nuclei with N≠Z to test shell-model wavefunctions is noted.

    Original languageEnglish
    Pages (from-to)445-451
    Number of pages7
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Publication statusPublished - 10 Apr 2018


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