19 July J. Chem. Phys., 131 (2009) 024505 goar | Uncategorized DOI:10.1063/1.3171567 G. Sánchez-Sanz, L. Seijo, and Z. Barandiarán. Spin-forbidden and spin-enabled 4f 14 → 4f 13 5d1 transitions of Yb2+ -doped CsCaBr3