The gamma decay of the excited rotating Yb-168 nucleus has been simula
ted considering the competition between El and E2 transitions, using m
icroscopically calculated rotational bands. The simulations were made
for two different cases: (i) pure rotating mean field bands and (ii) r
otational bands mixed by a residual interaction. Simulated gamma-gamma
spectra were analyzed in the typical rotational ridge-valley region.
The fluctuation analysis method, sensitive to the effective number of
gamma-decay paths, was also applied. An overall agreement between expe
rimental and simulated data is found for the case of mixed rotational
bands.