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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > intercombination line

intercombination line
subject			fact

intercombination line	has definition Spectral line emitted in transitions between two levels with different values of S.
	is a kind of spectral line
spectral line	has transition
	has equivalent width
spectral feature	has wavelength
	has width
	occurs in
	has species
radiation measurement	has unit radiation unit
number	has value