The quartet ground state in CeB6: An inelastic x-ray scattering studyM. Sundermann, K. Chen, H. Yavaş, Hanoh Lee, Z. Fisk, M. W. Haverkort, L. H. Tjeng and A. SeveringEPL, 117 1 (2017) 17003DOI: https://doi.org/10.1209/0295-5075/117/17003