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Homework Statement
The spectrum shows the series 3p  nd, n = 4  7 in Na as well as the resonance line 3s  3p, with the experimental vacuum wavelengths in Å.
Calculate the quantum defect for the nd ##^2D## n = 47 terms. Estimate, as accurately as possible, the wavelength for 3p  8d. The ionization energy in Na I is 41449.6 cm1. Neglect all finestructure.
Homework Equations
##E_{ionization}  E_{excitation} = T = R\frac{(zN_{inner})^2}{(n\delta)^2}##
The Attempt at a Solution
Hi!
I can take the inverse of the given wavelength, to get T. ##\frac{1}{\lambda} = T##.
Then I can plug this into the above equation and solve for delta. ##\delta = n  sqrt(\frac{R*(zN_{inner})^2)}{T})##
But my question is. Do I also need to take the quantum defect for p into account?
Where my ##T = R*(zN_{inner})^2 ( \frac{1}{(n\delta_p)^2}  \frac{1}{(n\delta_d)^2}) ##
And if so, how would I get ##\delta_p##?
If it was s, I could impy solve for ##delta_s## when putting ##T= E_{io}##.
Figure attached
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