Abstract
Optogalvanic detection of complex Zeeman patterns in a hollow-cathode lamp is investigated. Uranium lines with J1 = 6 and J2 = 7 are resolved, with our best results obtained using intermodulated optogalvanic spectroscopy (but this scheme is applicable only to lines giving strong signals). This detection method has a 40-MHz resolution, so a magnetic field of 0.1 T is sufficient to resolve most patterns. Weak lines can be studied with modulated optogalvanic spectroscopy. However, the stronger field required in this case perturbs the discharge. Although they are impractical for the measurement of component relative intensities, these detection methods may find applications in the determination of Landé g factors.
© 1987 Optical Society of America
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