photoabsorptionn.
/ˌfəʊtəʊəbˈzɔːpʃn/, /ˌfəʊtəʊəbˈsɔːpʃn/, U.S. /ˌfoʊdoʊəbˈzɔrpʃ(ə)n/, /ˌfoʊdoʊəbˈsɔrpʃ(ə)n/ Physics and Chemistry.
Absorption of light; spec. absorption of a photon by the electron shell surrounding an atomic nucleus.
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the world > matter > physics > electromagnetic radiation > light > [noun] > smallest unit of light > absorption of
photoabsorption1932
the world > matter > physics > atomic physics > particle physics > photon particle > [noun] > absorption of photon
photoabsorption1932
1932 Proc. Royal Soc. A. 135 206 The photo-absorption of the shell-electrons.
1946 Science 20 Dec. 599/1 The photographic half-value layer, i.e. the filtration which reduces the photographic effect by one half, may be obtained from the photoabsorption curve.
1966 Physical Rev. 149 55/1 (caption) Charge distribution of ions resulting from photoabsorption primarily in the 3d shell of krypton.
1993 Internat. Jrnl. Radiation Biol. 63 156/2 The K-shell absorption of phosphorus is..slightly less effective, in comparison with photoabsorption events by other atoms.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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