Wavelengths, transition rates, and line strengths are calculated
for the 76 possible multipole (E1, M1, E2, M2, E3, M3) transitions
between the n=4 excited states and ground state in
Ni-like ions with the nuclear charges ranging from Z = 30 to
100. Relativistic many-body perturbation theory (RMBPT), including
the Breit interaction, is used to evaluate energy and transition
rates for multipole transitions in hole-particle systems. This
method is based on relativistic many-body perturbation theory,
agrees with MCDF calculations in lowest-order, includes all
second-order correlation corrections and includes corrections from
negative energy states. The contributions from negative-energy states are
included in the second-order E1, M1, E2, M2, E3, and M3 matrix elements.
The resulting transition energies and transition rates are compared
with experimental values and with results from other recent calculations.
As a result, we present wavelengths and transition rates data for the
selected transitions that includes the 76 possible multipole
(E1, M1, E2, M2, E3, M3) transitions between the n=4 states and ground state.