HIGH-EXCITATION RYDBERG LEVELS OF FE-I FROM THE ATMOS SOLAR SPECTRUM AT 2.5 AND 7 MU-M

The quadrupole-polarization theory has been applied to the 3d(6)4s(D-6 )4f and 5g subconfigurations of Fe I by a parametric fit, and the fitt ed parameters are used to predict levels in the 6g and 6h subconfigura tions. Using the predicted values, we have computed the 4f-6g and 5g-6 h transition arrays and made identifications in the ATMOS infrared sol ar spectrum. The newly identified 6g and 6h levels, based on ATMOS wav enumbers, are combined with the 5g levels and found to agree with the theoretical values with a root mean-squared-deviation of 0.042 cm(-1). Our approach yields a polarizability of 28.07 a(o)(3) and a quadrupol e moment of 0.4360 +0.0010 ea(o)(2) for Fe II, as well as an improved ionization potential of 63737.700 +/- 0.010 cm(-1) for Fe I.