Determination of magnetic fields based on the Zeeman effect in regimes inaccessible by Zeeman-splitting spectroscopy

We discuss the limits of applying spectroscopic methods for the determination of magnetic fields that are based on the Zeeman effect and allow for extending the field diagnostics to conditions inwhich the Zeemansplit pattern is not resolvable. We analyze the diagnostic limits in terms of the minimummagnetic field that canbedetermined for a givenLorentzian line-width. This formof analysis isuseful since the Lorentzianprofile corresponds to the Stark broadening of isolated spectral lines that is often the mainmechanism of smearing out the Zeeman-split patterns inhigh-energy-densityplasmas. The analysis isperformed for the 2Se2Patomic system. It is shown that the curves that define the limits of the diagnostic methods in the magnetic-field Lorentzian-width plane, are linear for a wide range of parameters and can be obtained by employing simple expressions that are useful for planning experiments and diagnostic systems. 2013 Elsevier B.V. All rights reserved.