Physics Help Forum Kinetic energy of alpha particle in cockroft walton experiment.

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 Oct 25th 2014, 09:31 AM #1 Junior Member   Join Date: Oct 2014 Posts: 18 Kinetic energy of alpha particle in cockroft walton experiment. 1.*The*problem statement, all variables and given/known data When a*7*3*Li nucleus is bombarded with protons α particles emerge.Calculate the kinetic energy of the alpha particle assuming the kinetic energy of the bombarding proton to be negligible. Given M (7*3*Li)=7.016004a.m.u. M (p)=1.007826a.m.u and M(α)=4.002603a.m.u. 2.Relevant equations 7*3*Li +*1*1H --> 2 4*2He Q = (M*Li*+ MH*-2Mα)931.5MeV....1 Kα=n= [MαQ + Kp(Mα*- mp)]/2Mα....2 3. The attempt at a solution Using equation 1 Q=(7.016004+1.007826- 2×4.002603) 931.5 =17.35MeV It is given that Kp~0 so Kα= Q/2 =8.675MeV What do you people think about my solution methods used? The numerical values are matching approximately with the given answers in the text book by the way. Last edited by pranimaboity2050; Oct 25th 2014 at 09:44 AM.
Oct 25th 2014, 01:44 PM   #2

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 Originally Posted by pranimaboity2050 1.*The*problem statement, all variables and given/known data When a*7*3*Li nucleus is bombarded with protons α particles emerge.Calculate the kinetic energy of the alpha particle assuming the kinetic energy of the bombarding proton to be negligible. Given M (7*3*Li)=7.016004a.m.u. M (p)=1.007826a.m.u and M(α)=4.002603a.m.u. 2.Relevant equations 7*3*Li +*1*1H --> 2 4*2He Q = (M*Li*+ MH*-2Mα)931.5MeV....1 Kα=n= [MαQ + Kp(Mα*- mp)]/2Mα....2 3. The attempt at a solution Using equation 1 Q=(7.016004+1.007826- 2×4.002603) 931.5 =17.35MeV It is given that Kp~0 so Kα= Q/2 =8.675MeV What do you people think about my solution methods used? The numerical values are matching approximately with the given answers in the text book by the way.
Looks good to me.

-Dan
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 Tags alpha, cockroft, energy, experiment, kinetic, particle, walton