 Physics Help Forum Nuclear Reaction - How to determine variables as much as possible
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 Nuclear and Particle Physics Nuclear and Particle Physics Help Forum May 6th 2019, 04:22 AM #1 Junior Member   Join Date: May 2019 Posts: 3 Nuclear Reaction - How to determine variables as much as possible Hey Guys, exercise: "It is desired to study the first excited state of 16O which is at energy of 6.049 MeV. Using the (alpha, n) reaction on target of 13C, what is the minimum energy of incident alphas which will populate the excited state? So, i suggest to define first the reaction equation: alpha + 13C -> 16O + n where E(16O) = 6,049 MeV Because we are searching the minimum energy of the alpha, i would define the Q value = 0 (with kinetic energy of particle i = Ti) -> Tc + Ta = To +Tn -> Tc + Ta - Tn = 6,049 MeV How i get more information about the system? If iam using a change of the system from lab-frame(momentum of 13C = 0) to Center of Mass frame(Sum(momentum) = 0 of final products)), i get the following relation: E(alpha) = ((En)^2 + 12*En + 36MeV - (m(alpha)c)^2 - ((m(c))*c^2)^2)/2m(c)*c^2 Does somebody know a "trick" to get there more informations of the system to finally get the min. E of alphas? Best Regards, Chris Last edited by Samy89; May 6th 2019 at 04:32 AM.  Tags determine, nuclear, reaction, variables Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post ling233 Nuclear and Particle Physics 2 Nov 17th 2016 09:13 PM Devlan Nuclear and Particle Physics 2 Apr 21st 2013 11:25 AM SengNee Advanced Mechanics 4 Oct 13th 2009 10:36 PM Apprentice123 Advanced Mechanics 2 Oct 13th 2008 04:28 PM Raj Kinematics and Dynamics 1 Sep 15th 2008 04:17 PM