Magnetism of an Excited Self-Conjugate Nucleus: Precise Measurement of the g Factor of the 2(1)(+) State in Mg-24 - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Physical Review Letters Année : 2015

Magnetism of an Excited Self-Conjugate Nucleus: Precise Measurement of the g Factor of the 2(1)(+) State in Mg-24

A.E Stuchbery
  • Fonction : Auteur
G. Georgiev
B. Brown
  • Fonction : Auteur
A. Goasduff
L. Atanasova
D.L. Balabanski
  • Fonction : Auteur
M. Bostan
  • Fonction : Auteur
M. Danchev
  • Fonction : Auteur
P. Detistov
  • Fonction : Auteur
K.A. Gladnishki
  • Fonction : Auteur
J. Ljungvall
D. Radeck
  • Fonction : Auteur
C. Sotty
  • Fonction : Auteur
I. Stefan
D.T. Yordanov
A. Kusoglu
  • Fonction : Auteur

Résumé

A precise measurement of the g factor of the first-excited state in the self-conjugate (N = Z) nucleus Mg-24 is performed by a new time-differential recoil-in-vacuum method based on the hyperfine field of hydrogenlike ions. Theory predicts that the g factors of such states, in which protons and neutrons occupy the same orbits, should depart from 0.5 by a few percent due to configuration mixing and meson-exchange effects. The experimental result, g = 0.538 +/- 0.013, is in excellent agreement with recent shell-model calculations and shows a departure from 0.5 by almost 3 standard deviations, thus achieving, for the first time, the precision and accuracy needed to test theory. Proof of the new method opens the way for wide applications including measurements of the magnetism of excited states of exotic nuclei produced as radioactive beams.

Dates et versions

in2p3-01136183 , version 1 (01-04-2015)

Identifiants

Citer

A.E Stuchbery, G. Georgiev, B. Brown, A. Goasduff, L. Atanasova, et al.. Magnetism of an Excited Self-Conjugate Nucleus: Precise Measurement of the g Factor of the 2(1)(+) State in Mg-24. Physical Review Letters, 2015, 114 (Issue 6), pp.062501. ⟨10.1103/PhysRevLett.114.062501⟩. ⟨in2p3-01136183⟩
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