PART IISPECTRAL EVIDENCESAlkali DoubletsThe doublet lines of sodium and calcium are among the brightest spectral lines found. Why are the alkali doublets recipients of this intense light? It was found that the sodium doublet radiated from two lines, D1 and D2. The D1 line was based on a 2P1/2-----2S1/2 term. Both terms originate in the positive hemisphere of the Circular Model of the Atom and are "regular or erect". The 2P1/2 has one half integer electron multiplet incorporated within its term. With both terms originating in the positive hemisphere, the differential between terms is relatively modest. The second term 2P3/2 has two half integer electrons as well as the negative field origin. This sets up a significant differential between the 2P3/2 term and the 2S1/2 term. When light is emitted from these spectral terms it is very intense because of the much greater dipole differential. A similar explanation regarding this negative dipole differential can be shown by helium's first ionization potential of 24.6 electron volts. Lithium, the very next element after helium has a first ionization potential of 5.39 volts. Why the considerable difference? First, there is a difference in shells, but beryllium, next to lithium has a 1S0 ground state term and first ionization potential of 9.32 eV. Helium's position in the Circular Model of the Atom is within the negative field hemisphere. Lithium and beryllium's position is across the polarity border and in the positive field hemisphere. The structure within the atom is the key to these energy differentials as illustrated by the Circular Model of the Atom. |