Constants
Ion Wavelength f - value gamma value mass q coefficients
FeII 1608.45085 0.0577 2.74 x 108 55.847 -1300
FeII 1611.20034 0.00136 2.86 x 108 55.847 1100
NiII 1709.6042 0.0324 4.35 x 108 58.728 -20
NiII 1741.5531 0.0427 5.00 x 108 58.728 -1400
NiII 1751.9157 0.0277 3.70 x 108 58.728 -700

q coefficients from Laboratory spectroscopy and the search for space-time variation of the fine structure constant using QSO spectra.
by: J. C. Berengut, V. A. Dzuba, V. V. Flambaum, M. V. Marchenko, and J. K. Webb 8 Mar 2007

c = 2.9979245800 x 10^10 cm/s

e = 4.80324 x 10^-10 esu

mass of electron = 9.10938188 x 10^-28

pi^(1/2) * e^2 / ( m_e * c ) = 0.0149738645

(1)
\begin{align} \frac{\pi^{1/2} e^2}{m_e c} = 0.0149738645 \end{align}
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