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3

Firstly, regarding the extra question: Atkins' Molecular Quantum Mechanics (5th ed.) uses "term" for $^2\!S$, and "level" for $^2\!S_{1/2}$. Back to the main question. It's been a long time since I did term symbols, so I am happy to be corrected, but if I am not wrong, your $^4\!P$, $^4\!D$, and $^2\!S$ terms are not allowed because of the Pauli exclusion ...

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This answer is based on the educated guess that the green excitation Raman spectrum was acquired with a dispersive Raman instrument*. But why is there general nonzero background in intensity? What caused it? For any real-life instrumentation, you should never assume to measure 0 signal for 0 analyte concentration (see also Does a calibration curve of ...

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There is no reason why fluorescence emission background should look similar at all with green and red excitation. Different substances You say the green excitation spectrum is of Coke. According to the video, the red excitation spectrum is of the peel of a tangerine. Those samples consist of totally different substances so they will have different ...

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An elder way would be the via book examples, like «Organic Structures from Spectra» by Field, Sternhell, Kalman, with dozens and dozens of combined exercises in a format like the following: and currently available in the 5th edition by Wiley (e.g., here). There is a related project of «Interactive Spectroscopy Problems» by the University of Calgary (here), ...

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