proton-proton reaction
proton-proton reaction
[′prō‚tän ′prō‚tän rē‚ak·shən] (nuclear physics)
The initiating reaction in the proton-proton chain, in which two protons react to form a deuteron, a positron, and a neutrino. Abbreviated PP reaction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
One possible interpretation of the GALLEX findings hinges on the fact that the observed capture rate is close to that predicted just for low-energy neutrinos arising from
proton-proton reactions. These low-energy neutrinos may make it to Earth unchanged, whereas high-energy neutrinos, produced in other nuclear reactions involving such isotopes as boron-8 and beryllium-7, somehow transform themselves into a different form that can't be observed.
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