Dependence of the $^{12}$C($\vecγ$,pd) reaction on photon linear polarisation
The sensitivity of the $^{12}$C$(\vecγ,pd)$ reaction to photon linear polarisation has been determined at MAMI, giving the first measurement of the reaction for a nucleus heavier than $^{3}$He. Photon asymmetries and cross sections were measured for $E_γ$=170 to 350 MeV. For $E_γ$ below the $Δ$ resonance, reactions leaving the residual $^{9}$Be near its ground state show a positive asymmetry of up to 0.3, similar to that observed for $^{3}$He suggesting a similar reaction mechanism for the two nuclei.
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