De-excitation processes of optically excited Nd3+ pairs in CsCdBr3 R.B. Barthem, R. Buisson, F. Madèore, J.C. Vial et J.P. Chaminade J. Phys. France, 48 3 (1987) 379-387 DOI: 10.1051/jphys:01987004803037900