Measurement of Dipole-Moment in Atomic Transitions under Strong External Magnetic Field
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Obtaining an accurate value of the electric dipole moment μ is essential in the fields of laser application technologies. A direct way of measuring the electric dipole moment μ is to observe the Rabi-oscillation which manifests itself in the coherent photo-excitation behavior of atoms. In the case of the elements which have large angular momenta, identifying the Rabi-oscillation in their excitation behavior becomes rather difficult. We proposed an accurate and straightforward method of determining the electric-dipole moment μ between multi- fold degenerate levels. The point is to remove the degeneracy by applying an external magnetic field with the aid of the Zeeman effect and, then, to realize a degeneration free coherent excitation. As a result, we can observe the Rabi-oscillations explicitly in the excitation vs. laser-fluence curves. The present method provides a reliable basis of experimental determination of μ. As an example, we applied the present method to a transition to 0-17, 362 cm<SUP>-1</SUP> level in uranium and obtained the value μ=0.86±0.06 (Debye).
- Journal of Nuclear Science and Technology
Journal of Nuclear Science and Technology 33(7), p.569-576, 1996-07-25
Atomic Energy Society of Japan