K40 e Ar40 ne

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Where did the missing momentum/energy go...?
Linus Pauling
K40 e- --gt Ar40 ne K40 --gt Ca40 e- ne
... a neutrino! (1930)
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Example of missing energy
http//hyperphysics.phyastr.gsu.edu/hbase/nuclear/
beta.html
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Artist's rendition of a neutrino
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Frederick Reines
Clyde Cowan
They won the Nobel Prize in 1995
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http//www.ps.uci.edu/physics/news/nuexpt.html
In the laboratory...
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Nuclear reactor
3 detections per hour
P n --gt e n
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http//www.ps.uci.edu/physics/news/nuexpt.html
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Modern view of the neutrino
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Wow Neutrinos!
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http//wwwlapp.in2p3.fr/neutrinos/anchiffres.html
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