Paramagnetic Resonance Absorption in Bromine and Chlorine

Magnetic resonance in Kazan and in Oxford

“…Six transitions within the 2P3/z ground state were fitted to the hyperfine structure constants known from atomic beam measurements. These, and similar measurements on atoms of chlorine and bromine [52], generated by a radio-frequency discharge, gave precise values for gj. Comparison with various theoretical values, including corrections for the BreitMargenau, spin-other-orbit and orbit-orbit effects produced agreement within a few ppm, except for iodine (15 ppm).…”

Zeeman Effect in theP122Level of Atomic Fluorine

“…They used Brown's 20 self-consistentfield wave functions for the dominant kinetic-energy correction and Slater's 21 approximate screened hydrogenic functions for the spherically averaged radial integrals, and obtained a g factor in agreement with experiment to within 2 ppm. Harvey, Kamper, and Lea, 6 in a similar calculation using Brown's wave functions throughout, also obtained agreement to within 2 ppm. This quite remarkable agreement does not, however, extend to the excited level where the two calculations yield g factors differing by 50 ppm.…”

Electron Paramagnetic Resonance in Gases

“…The hyperfine constants (magnetic and electric quadrupole) were determined as -218.7(2) and -10.4 (5) MHz. From the latter a value of Q = -0.0265 (30) b was estimated, close to that of -0.026(9) b of Stevenson and Townes (29). Precise g-values, obtained for chlorine and bromine (30) were supplemented by measurements on atomic iodine, formed by photo-dissociation (31).…”

“…From the latter a value of Q = -0.0265 (30) b was estimated, close to that of -0.026(9) b of Stevenson and Townes (29). Precise g-values, obtained for chlorine and bromine (30) were supplemented by measurements on atomic iodine, formed by photo-dissociation (31). The results for the J = 3/2 level, are: chlorine, 1.333927 5 (3 ppm); bromine, 1.333921 (5 ppm); iodine, 1.333995 (4 ppm).…”