  Short-range correlations between nucleon pairs in different spin-isospin
channels are investigated for light nuclei using the Argonne V8' interaction.
At distances below 1 fm a universal behavior is found for the deuteron, 3H, 3He
and for ground and first excited states in 4He. This behavior in coordinate
space is reflected by a universal behavior for the high-momentum components in
momentum space. The universality indicates that a pairwise renormalization is
possible in order to obtain a universal effective two-body interaction that
does not scatter to high momentum states. The exact two-body densities are
compared with those obtained using the unitary correlation operator method with
simple trial wave functions. The effect of three-body correlations due to the
tensor force on the two-body densities is discussed.
