Abstract

The Zeeman effect in the two strongest mixed multipole lines of neutral bismuth was studied with apparatus of high resolving power and magnetic fields up to 6400 G. Remarkable differences of intensity distribution among the ΔM = ±1 components, caused by interference between the magnetic-dipole and the electric-quadrupole radiation, are found for the two directions of observation (longitudinal L and transverse π). This interference effect was observed for the first time in a spectrum with hyperfine structure. In stronger fields, the transitions investigated are of the type ΔM = M_F′ − M″, where M″ = M_J″ + M_I″; the individual components belonging to various M_F′ and M_I″ formed unresolved groups. For the line $4615\hspace{0.17em}\AA ({{}^{2}P°}_{\frac{1}{2}}\to {{}^{4}S°}_{\frac{3}{2}})$, the sum of the interference terms decreases the intensities of groups with ${M_J}^{″}=\pm \frac{3}{2}$ and increases the intensities of groups with ${M_J}^{″}=\pm \frac{1}{2}$ in the L direction; the reverse is true for the transverse π direction. The line $6476\hspace{0.17em}\AA \hspace{0.17em}({{}^{2}D°}_{\frac{5}{2}}\to {{}^{4}S°}_{\frac{3}{2}})$ exhibits the opposite behavior. In spite of the complex, and to a great extent unresolved, detailed structure of the Zeeman pattern at low as well as at high fields, the observations of finer details seem to support the expectation that coupling of the J vector to the nuclear moment I does not destroy, but only modifies, the interference terms so that they operate on the individual hyperfine-structure components.

© 1970 Optical Society of America

Zeeman Effect in the Multipole Line 4615 Å of Bi i

S. T. Dembinski, J. Heldt, and L. Wolniewicz
J. Opt. Soc. Am. 62(4) 555-561 (1972)

Hyperfine Structure of the Multipole Lines of Bismuth (Bi i)*

Joseph Heldt
J. Opt. Soc. Am. 58(11) 1516-1519 (1968)

Computer simulation of experimental Zeeman-effect patterns of forbidden lines of B i and Bi ii and estimation of electric-quadrupole admixture in mixed-type radiation

Jolanta Czerwinska
J. Opt. Soc. Am. B 4(9) 1349-1357 (1987)

Zeeman effect in the forbidden lines of antimony Sb i

Jozef Heldt and Malcom Hults
J. Opt. Soc. Am. 73(9) 1189-1196 (1983)

Zeeman Effect in Multipole Lines of Te i*

J. Heldt
J. Opt. Soc. Am. 57(7) 865-867 (1967)