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The levels in' "" Ru have been investigated in the spontaneous fission of 2Cf using y-y-y-, y-y-, x-x-,x-y-, and x-y-y-coincidence techniques. The levels up to 16+ and 9+ in the yrast bands and y-vibrational bands have been identified with very little energy staggering in ' "" Ru. The ground bands in ' " Ru have identical y-ray transition energies up to 8+. These are the lightest observed even-even nuclei with extended identical ground bands. Calculations in a collective model which includes rotations and vibrations reproduce the level energies and y band branching ratios above the 3+ state rather we11, while rigid triaxial rotor model calculations reproduce the branching ratios for the 2+ and 3+ states.PACS number(s): 21.10. Re, 23.20.Lv, 21.60.Ev, 27.60.+j