semi-forbidden line concept from the Astronomy knowledge base

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semi-forbidden line

subject fact

semi-forbidden line has definition 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. has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:24.0
is a kind of emission line

emission line has antonym absorption line

spectral line has transition 2001-09-27 09:33:20.0
has equivalent width

spectral feature has wavelength 2001-09-27 09:33:18.0
has width
occurs in
has species

radiation measurement has unit radiation unit 2001-09-27 09:33:16.0

number has value 2001-09-27 09:32:57.0

semi-forbidden line	has definition 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.
semi-forbidden line	is a kind of emission line
emission line	has antonym absorption line
spectral line	has transition
spectral line	has equivalent width
spectral feature	has wavelength
	has width
	occurs in
	has species
radiation measurement	has unit radiation unit
number	has value