A pair of closely lying states of opposite parity and the same total e
lectronic angular momentum J = 10 at 19797.96 cm-1 in dysprosium are e
xperimentally investigated with the goal of evaluating parameters rele
vant to P and P, T violation experiments. Measurements of lifetimes, e
lectric polarizability, and energy intervals between isotope and hyper
fine components are presented.