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Proton with kinetic energy T=1.0MeV stri...

Proton with kinetic energy `T=1.0MeV` strinking a lithium target induces a nuclear reaction `._(1)^(1)P+._(3)^(7)Lirarr2._(2)^(4)He`. Find the kinetic energy of each `alpha-`particle and the angle of their divergence provided their motion directions are symmetrical with respect to that of incoming protons.
`[m_(p)=1.00783 "amu",m_(Li)=7.01601 "amu",m_(He)=4.00260 "amu"]`

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