1. To calculate the energy of a single electron atom with quantum numbers L, S, and J: E L,S,J = ½ hc [J(J+1) - L(L+1) – S(S+1)] where  is the spin-orbit coupling constant Calculating Energies for Transitions

2. Atomic emission spectra show a doublet in the Na spectrum due to spin-orbit coupling of the 2 P state. Given that = 11.4 cm -1, find the energy spacing (in cm -1 ) between the atomic emission lines from 2 P 3/2 and 2 P 1/2 to 2 S 1/2. Are you getting the concept?

3. Example AE Spectra http://www.technology.niagarac.on.ca/lasers/Chapter2.html H2H2H2H2 Hg He

4. Arcs and Sparks Arc = An electrical discharge between two or more conducting electrodes (1-30 A)Arc = An electrical discharge between two or more conducting electrodes (1-30 A) Spark = An intermittent high-voltage discharge (few  sec)Spark = An intermittent high-voltage discharge (few  sec) Limited to qualitative and semi-quantitative use (arc flicker)Limited to qualitative and semi-quantitative use (arc flicker) Particularly useful for solid samples (pressed into electrode)Particularly useful for solid samples (pressed into electrode) The burn takes > 20 sec (need multichannel detector)The burn takes > 20 sec (need multichannel detector) Ingle and Crouch