QUADRUPOLE SPLITTING OF THE WEAKLY-BOUND SYSTEM [(DT-MU)-(11)DEE]

The energy levels of the molecular complex [(dt mu)(11)dee] are close to the sum of the energies of the (dt mu)(11) and D-2 molecules; the s mall difference of a few meV, referred to as ''finite size correction' ', is an effect of the Coulomb interaction with the spatially distribu ted electrical charge in the compound nucleus of the complex. The quad rupole terms in the multipole expansion of the latter are shown to int erfere with the spin interactions and to modify the hyperfine structur e of the levels of the complex in a way that may affect the resonant f ormation rate of (dt mu)(11).