  A systamatic quantitative comparison of ''pseudogap'' values obtained from
the analysis of charge and spin excitation spectroscopies in underdoped
YBa2Cu3O7-x using a temperature-independent gap shows two distinct excitations,
one visible in spin-flip spectroscopies like NMR and spin polarized neutron
scattering, and the other in charge excitation spectoscopies like single
particle tunneling and time-resolved quasiparticle relaxation. Both appear to
decrease with doping x approximately as 1/x and are T-independent, existing
above and below Tc. We suggest that the charge excitation can be attributed to
a pair-breaking local gap, while the spin excitation can be explained by an
intra-gap local triplet state.
