The quadrupole moments of 29Mg and 33Mg have been constrained by collinear laser spectroscopy at CERN-ISOLDE. The values are consistent with shell-model predictions, thus supporting the current understanding of light nuclei associated with the "island of inversion".
@article{arxiv.1905.05580,
title = {Quadrupole Moments of 29Mg and 33Mg},
author = {Deyan Todorov Yordanov and Magdalena Kowalska and Klaus Blaum and Marieke De Rydt and Kieran T. Flanagan and Pieter Himpe and Peter Lievens and Stephen Mallion and Rainer Neugart and Gerda Neyens and Nele Vermeulen and Henry Stroke},
journal= {arXiv preprint arXiv:1905.05580},
year = {2020}
}