Chiral vibrations and collective bans in ^104,106Mo

New theoretical calculations of ¹⁰⁴Mo and ¹⁰⁶Mo have been conducted. Reduced transition probabilities for the proposed chiral bands in both isotopes have been calculated from TPSM and are found in good agreement with the experimental data. High spin states of the neutron-rich triaxial  ¹⁰⁴Mo nucleus have been reinvestigated by analyzing both γ-γ-γ and γ-γ-γ-γ coincidence data in the spontaneous fission of ²⁵²Cf with Gammasphere.  A new ΔI=1 band was discovered. The new band is proposed to have a tentative 5⁻ band head and form a class of chiral doublets with another 4− band previously found by our group. Angular correlation measurements have been performed to determine spin and parity of the 4⁻ chiral band head. The energies of the two sets of chiral bands are very similar to the chiral bands observed in ¹⁰⁶Mo, e.g. the two 5⁻ levels in ¹⁰⁴Mo are at 2211.9 and 2276.8 keV with ΔE=65 keV and in 106Mo, 1952.4 and 2090.6 keV with ΔE=138 keV. Now at every spin 5⁻, 6⁻, 7⁻, 8⁻, the separation energies of the same spin states are about a factor of two smaller than in ¹⁰⁶Mo. This indicates even better agreement with expectations for two sets of chiral bands.