24Mg

[paper] g factors of nuclear low-lying states: A covariant description

g factors of nuclear low-lying states: A covariant description

JangMing Yao et al.

doi: 10.1007/s11433-010-4214-8

The g factors and spectroscopic quadrupole moments of low-lying excited states 2+1 , … , 8+1 in 24Mg are studied in a covariant density functional theory. The wave functions are constructed by configuration mixing of axially deformed mean-field states projected on good angular momentum. The mean-field states are obtained from the constraint relativistic point-coupling model plus BCS calculations using the PC-F1 parametrization for the particle-hole channel and a density-independent delta-force for the particle-particle channel. The available experimental g factor and spectroscopic quadrupole moment of 2+1 state are reproduced quite well. The angular momentum dependence of g factors and spectroscopic quadrupole moments, as well as the effects of pairing correlations are investigated.

[paper] Orientation features of 24Mg(2+) aligned nuclei in (p,p) and (d,d) reactions at Ex ≈ 7.5 MeV per nucleon

Orientation features of 24Mg(2+) aligned nuclei in (p,p) and (d,d) reactions at Ex ≈ 7.5 MeV per nucleon

L.I. Galanina et al.

doi: 10.1134/S1063778815060095

Experimental angular dependences of cross sections for elastic and inelastic scattering and the result obtained by reconstructing the populations of magnetic sublevels, multipole-moment orientation tensors, and polarization tensors are presented for 24Mg (2+, 1.369 MeV) aligned nuclei produced in inelastic proton scattering at Ep = 7.4 MeV. The experimental results in question are compared with the results of calculations based on the coupled-channel method and on the compound-nucleus model, the 3/2+ resonance in the 25Al compound nucleus being taken into account. The orientation features of 24Mg (2+, 1.369 MeV) nuclei produced in inelastic proton and deuteron scattering on 24Mg at Ex ≈ 7.5 MeV per nucleon are found to be generally similar despite a substantial difference in the respective differential cross sections.

[paper] Nuclear Charge Radii of 21-32Mg

Nuclear Charge Radii of 21-32Mg

D.T. Yordanov et al.

doi: 10.1103/PhysRevLett.108.042504

Charge radii of all magnesium isotopes in the sd shell have been measured, revealing evolution of the nuclear shape throughout two prominent regions of assumed deformation centered on 24Mg and 32Mg. A striking correspondence is found between the nuclear charge radius and the neutron shell structure. The importance of cluster configurations towards N=8 and collectivity near N=20 is discussed in the framework of the fermionic molecular dynamics model. These essential results have been made possible by the first application of laser-induced nuclear orientation for isotope shift measurements.