HYPERFINE-STRUCTURE CONSTANTS FOR TI-47(I)3D(2)4S(2)P-3

We report magnetic dipole hyperfine-structure constants, obtained by doing nonrelativistic configuration-interaction calculations, for Ti-47 I 3d(2)4s2 3P, which are in excellent agreement with experiment [theory (experiment) A2 = -23.150 (-25.215) MHz, A1 = 2.202 (2.665) MHz] in contrast with Hartree-Fock and some semiempirical values. Second-order electrostatic effects, arising mainly from the 3d(3)4s configuration, are crucial to understanding this system. The nuclear quadrupole coupling constant is -138.4 MHz and 69.2 MHz x Q (in b) (J = 1,2). By combining with measurement, we predict Q = 0.346 b. Hyperfine-structure constants are also given for the 3d(3)4s and 3d4 3P terms.