The cross section of the 3He(α,γ)7Be reaction is an important quantity in several areas of nuclear astrophysics. However, the cross section is not well known at centre of mass energies above Erel = 1.5 MeV where only two discrepant data sets currently exist. In September of 2011, four 3He(α,γ)7Be cross section measurements above Erel = 1.5 MeV were made using the direct 7Be recoil detection method with the DRAGON (Detector of Recoils And Gammas Of Nuclear reactions) recoil mass separator at TRIUMF. Since 100% recoil detection efficiency is not possible with DRAGON, a two stage Monte Carlo simulation has been completed to determine the recoil transmission efficiency for each 3He(α,γ)7Be cross section measurement. This thesis describes the simulation, discusses its results, and draws conclusions relevant to future experiments.
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