emission line Comparison Table

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emission line comparison table

Subject has specie has definition has synonym has wavelength has transition

coronal green line Fe XIV An emission line of Fe XIV, the strongest line in the solar corona. 5303 Å ²P_3/2 - ²P_1/2

forbidden line Spectral line emitted from a metastable state (q.v.), or those which have a very low probability (10^-9-10^-10) of occurrence. They appear at particle densities ≤ 10⁸ cm^-3. All forbidden lines have low excitation potentials. Forbidden lines are designated by enclosing them in brackets, e.g., [O II]. nebular line

inverse P Cygni line An emission line in which the emission is on the violet side of the absorption. It is usually interpreted to mean infall of matter.

K alpha A spectral line in the X-ray region (α = 0.334 Å), produced by the transition between the lowest level of the K shell and the lowest level of the L shell.

main lines The transitions that emit radiation at 1665 and 1667 mhz of an OH source.

radio recombination line Radio recombination lines are the result of electron transitions between high-n (n > 50) levels in an atom or ion.

semi-forbidden line Spectral lines from "semiforbidden" transitions, i.e., those whose transition probabilities are perhaps 1 in 10⁶ instead of about 1 in 10⁹ for forbidden transitions. One bracket - e.g., [C III] - is used to indicate semiforbidden lines.

Subject	has specie	has definition	has synonym	has wavelength	has transition
coronal green line	Fe XIV	An emission line of Fe XIV, the strongest line in the solar corona.		5303 Å	²P_3/2 - ²P_1/2
forbidden line		Spectral line emitted from a metastable state (q.v.), or those which have a very low probability (10^-9-10^-10) of occurrence. They appear at particle densities ≤ 10⁸ cm^-3. All forbidden lines have low excitation potentials. Forbidden lines are designated by enclosing them in brackets, e.g., [O II].	nebular line
inverse P Cygni line		An emission line in which the emission is on the violet side of the absorption. It is usually interpreted to mean infall of matter.
K alpha		A spectral line in the X-ray region (α = 0.334 Å), produced by the transition between the lowest level of the K shell and the lowest level of the L shell.
main lines		The transitions that emit radiation at 1665 and 1667 mhz of an OH source.
radio recombination line		Radio recombination lines are the result of electron transitions between high-n (n > 50) levels in an atom or ion.
semi-forbidden line		Spectral lines from "semiforbidden" transitions, i.e., those whose transition probabilities are perhaps 1 in 10⁶ instead of about 1 in 10⁹ for forbidden transitions. One bracket - e.g., [C III] - is used to indicate semiforbidden lines.

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