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photodisintegration

[foh-toh-di-sin-ti-grey-shuh n] /ˌfoʊ toʊ dɪˌsɪn tɪˈgreɪ ʃən/
noun, Physics.
1.
the disintegration of a nucleus, induced by its absorption of a photon.
Origin
1930-1935
1930-35; photo- + disintegration
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for photodisintegration

photodisintegration

/ˌfəʊtəʊdɪˌsɪntɪˈɡreɪʃən/
noun
1.
disintegration of an atomic nucleus as a result of its absorption of a photon, usually a gamma ray
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for photodisintegration

in physics, nuclear reaction in which the absorption of high-energy electromagnetic radiation (a gamma-ray photon) causes the absorbing nucleus to change to another species by ejecting a subatomic particle, such as a proton, neutron, or alpha particle. For example, magnesium-25, upon absorbing a photon of sufficient energy, emits a proton and becomes sodium-24. Photodisintegration differs from the nuclear reaction photofission, in which a nucleus, upon absorbing a photon, splits into two fragments of nearly equal mass

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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