Near-field subsurface electromagnetic tomography and holography
Methods of multifrequency tomography and holography of subsurface dielectric inhomogeneities in the near-field zone based on the solution of inverse scattering problem are studied from the viewpoint of their applicability for targets with strong dielectric contrasts or with a complicated internal structure. Results based on numerical simulation with input data calculated from Maxwell equations are presented.
Inverse scattering problems in subsurface diagnostics of inhomogeneous media
Methods of electromagnetic sounding, tomography and holography of subsurface dielectric inhomogeneities based on measurements of scattered field are considered. Two main statements of inverse scattering problem are studied: first, based on the solution of the nonlinear integral equation for the scattered field that can be solved iteratively beginning with the Born approximation, and second, based on the dual regularization method - a Lagrange approach in the theory of nonlinear ill-posed problems. Some of these methods have been studied experimentally.
Rotational Analysis of the CrO Bands
The (0, 1), (0, 0) and (1, 0) bands of the CrO, which appear in the red and yellow region, are analysed rotationally, and we have been able to show that these bands owe to the transition 5 Π- 5 Π. We have shown the theoretical formulae for the quintet state, which can be applied in the case of nearly (a), and obtained the molecular constants as follows,