  Millisecond pulsars are subject to accelerations in globular clusters that
manifest themselves in both the first and second spin period time derivatives,
and can be used to explore the mass distribution of the potentials they
inhabit. Here we report on over 20 years of pulsar timing observations of five
millisecond radio pulsars in the core of the core-collapse globular cluster
NGC\,6752 with the Parkes (Murriyang) and MeerKAT radio telescopes, that have
allowed us to measure the proper motions, positions and first and second time
derivatives of the pulsars. The pulsar timing parameters indicate that all the
pulsars in the core experience accelerations and jerks that can be explained
only if an amount of non-luminous mass of at least $2.56\times10^3M_\odot$ is
resent in the core of NGC\,6752. On the other hand, our studies highly
disfavour the presence of an intermediate mass black hole at the center of the
cluster, with a mass equal to or greater than $\sim3000M_\odot$.
