Nuclear Spin and Magnetic Moment of the Ground State of <sup>49</sup>Cr

Jönsson, J O; Sanner, L.; Wannberg, B.

doi:10.1088/0031-8949/2/1-2/003

Cited by 6 publications

(1 citation statement)

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“…As for the ground state of 45 Ti, the measured magnetic dipole moment of the (5/2) − 1 state of 49 Cr is uncertain in sign [139]. As a consequence, present-day SM calculations of the related g-factor cannot be properly assessed yet.…”

Section: N = Z + 1 Nucleimentioning

confidence: 99%

Magnetic dipole moments as a strong signature for $$\alpha $$-clustering in even-even self-conjugate nuclei

2022

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We investigate the magnetic dipole moments in even-even self-conjugate nuclei from $$^{12}$$ 12 C to $$^{48}$$ 48 Cr. For these nuclei, the measured gyromagnetic factors of excited states turn out to assume the same value of $$g \approx + 0.5$$ g ≈ + 0.5 within statistical errors. This peculiar feature can be interpreted on the basis of collective excitations of $$\alpha $$ α -clusters. Analogously, the behaviour of the same observable is studied for all isotopes obtained by adding one or two neutrons to the considered self-conjugate nuclei. It is found that for the $$N = Z + 1$$ N = Z + 1 isotopes the $$\alpha $$ α -cluster structure hardly contributes to the observed negative g- factor value, corroborating molecular $$\alpha $$ α -cluster models. The addition of a further neutron, however, restores the original $$\alpha $$ α -cluster g-factors, except for the semi-magic isotopes, in which the deviations from $$g \approx + 0.5$$ g ≈ + 0.5 can be associated with the relevant shell closures. Secondly, we analyze the same observable in the framework of a macroscopic $$\alpha $$ α -cluster model on a finite lattice of side length L. We focus on the discretization effects induced in the magnetic dipole moments of the $$2_1^+$$ 2 1 + and the $$3_1^-$$ 3 1 - states of $$^{12}$$ 12 C at different values of the lattice spacing a.

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Section: N = Z + 1 Nucleimentioning

confidence: 99%