Figure 1. Temperature effect on some bands of (H218O)2 trapped in Ne (Ne/H218O=800). Spectra recorded at 8 K (lower traces) and 4 K (upper traces) after annealing at 10 K. M: Q(1)-type line of 2ν1 of the monomer. Plot 1. and 301. - (ν1+ν2)/(ν1+ν3) PD; Plot 601. and 401. - ν1/2ν2 PA; Plot 201. and 501. - ν1/2ν1 PD.