In this equation, [n.sub.max] represents the maximum value of the
principal quantum number n which can be found in (17) in [20], while m is the BH excited level.
where n is the
principal quantum number of the contour, a is the inverse of the fine structure constant, [m.sub.e] and [r.sub.e] are the mass and classical radius of the electron, [c.sub.0] is the dimensionless speed of light equal to c/[m/sec].
where n is an integer
principal quantum number, [zeta] is the screening constant, and [S.sub.lm] ([theta], [phi]) is a complex or real spherical harmonic (see [27-29] for exact definitions).
We should not confuse this with the number n a
principal quantum number, corresponding to the number of electron shells in the atom number and the period of the atom in the periodic table of elements by D.I.