EIGENVALUES AND EXPECTATION VALUES FOR THE 1S(2)2S S-2, 1S(2)2P P-2, AND 1S(2)3D D-2 STATES OF LITHIUM

High-precision variational eigenvalues for the 1s(2)2s S-2, 1s(2)2p P-2, and 1s(2)3d D-2 states of lithium are calculated using multiple basis sets in Hylleraas coordinates. Convergence to a few parts in 10(10)-10(11) is achieved. The nonrelativistic energies for infinite nuclear mass are -7.478 060 323 10(31) a.u. for the 1s(2)2s S-2 state, -7.410 156 521 8(13) a.u. for the 1s(2)2p P-2 state, and -7.335 523 541 10(43) a.u. for the 1s(2)3d D-2 state. The corresponding specific isotope shifts due to mass polarization are also calculated with similar accuracy. The 1s(2)2s S-2-1s(2)2p P-2 and 1s(2)2p P-2-1s(2)3d D-2 transition energies for Li-7 and Li-6, as well as the isotope shifts, are calculated and compared with experiment. The results yield an improved ionization potential for lithium of 43 487.167(4) cm(-1). Expectation values of powers of r(i) and r(ij) and the delta functions delta(r(i)) and delta(r(ij)) are evaluated.