B(E2) Measurements in the Yrast Band of 28Mg: Implications on the N=20 Island of Inversion
ORAL
Abstract
In nuclei near the N=20 island of inversion, deformation and non-central tensor components of the nuclear interaction drive preferential occupation of pf-shell orbitals over the sd-shell orbitals predicted by the spherical shell model. High precision, excited state lifetime measurements in nuclei along the Mg isotopic chain provide a means to study the evolution of neutron shells systematically and better understand the onset of the island of inversion. In a recent experiment performed at TRIUMF, both the Doppler shift attenuation and recoil distance methods were used to measure excited state lifetimes in 28Mg, including the (6+1) -> 4+1 -> 2+1 -> 0+g.s. yrast band. In this talk, I will discuss the results of this work and the implications on neutron shell evolution in Mg isotopes and the onset of the N=20 island of inversion.
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Publication: M. S. Martin et al., Phys. Rev. C 110, 034314 (2024). Published
Presenters
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Matthew S Martin
- Argonne National Laboratory