Energy Sources in Stars (§10.3)
Energy Sources in Stars (§10.3)
Energy Sources in Stars (§10.3)
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Proton-Proton Cha<strong>in</strong>Basic particles <strong>in</strong>volved <strong>in</strong> nuclear reactionsParticlephotonneutr<strong>in</strong>oanti-neutr<strong>in</strong>oelectronpositronproton ( 1 1H)neutronSymbolγνν-e-e+p+nRest mass(kg)0>0>09 x 10 -319 x 10 -311.6 x 10 -271.6 x 10 -27Charge (e-)000-1+1+10Sp<strong>in</strong>11/21/21/21/21/21/2deuteron21H3.2 x 10 -27+1Conservation Laws <strong>in</strong> nuclear reactions:(1) mass-energy(2) charge(3) difference between number particles and anti-particles conserved -ie particle cannot be created from anti-particle or vice-versa but a pair can beformed or destroyed without violat<strong>in</strong>g this rule
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