THEORETICAL AND EXPERIMENTAL-DETERMINATION OF THE POLARIZABILITIES OFTHE ZINC S-1(0) STATE

A combined experimental and theoretical study of the polarizabilities of the ground-state zinc atom is presented. In our interferometric mea surements we have obtained the frequency dependence of the linear dipo le polarizability alpha(omega) between omega=0.05E(H)<(h)over bar (-1) > and 0.14E(H)<(h)over bar (-1)> (here E(H) is the Hartree energy). A detailed theoretical CCSD(T) study (coupled-cluster with single and do uble excitations and perturbational treatment of triple excitations) g ives the static (zero-frequency) values of the linear dipole polarizab ility alpha, the second dipole hyperpolarizability gamma, the quadrupo le-quadrupole polarizability alpha(2), and the dipole-dipole-quadrupol e polarizability B. From these studies we conclude with the static val ues of alpha=38.8(8)e(2)a(0)(2)E(H)(-1) (from experiment), alpha=39.2( 8)e(2)a(0)(2)E(H)(-1) (from theory), gamma=31(6)x10(3)e(4)a(0)(4)E(H)( -3), alpha(2)=324.8(16.2)e(2)a(0)(4)E(H)(-1), and B=-2.37(24)x10(3)e(3 )a(0)(4)E(H)(-2).