Approximate polarization selection rules for the 3P0 → 3H4 transition in Pr: β" alumina single crystals P. R. NELSON, D. J. VICKERS et O. M. STAFSUDDJ. Phys. IV France, 04 C4 (1994) C4-419-C4-422DOI: https://doi.org/10.1051/jp4:19944100
