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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > set of lines > multiplet

multiplet
subject			fact

multiplet	has definition A group of spectral lines arising from transitions having a common lower energy level. The group of lines have the same values of L and S but different values of J.
	is a kind of set of lines
spectral feature	has wavelength
	has width
	occurs in
	has species
radiation measurement	has unit radiation unit
number	has value

Kinds of multiplet :

• doublet (2 facts) - In a spectrum, a pair of associated lines arising from transitions having a common lower energy level.
• supermultiplet (2 facts) - A multiplet of multiplets.