Dependence of the $^{12}$C($\vecγ$,pd) reaction on photon linear polarisation

D. P. Watts; J. R. M. Annand; R. Beck; D. Branford; D. Glazier; P. Grabmayr; K. Livingston; I. J. D. Macgregor; J. C. Mcgeorge; R. O. Owens

doi:10.1016/j.physletb.2007.02.013

arXiv · nucl-ex/0506018

Dependence of the $^{12}$C($\vecγ$,pd) reaction on photon linear polarisation

D. P. Watts·J. R. M. Annand·R. Beck·D. Branford·D. Glazier·P. Grabmayr·K. Livingston·I. J. D. Macgregor·J. C. Mcgeorge·R. O. Owens

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Abstract

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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D. P. Watts, J. R. M. Annand, R. Beck, D. Branford, D. Glazier, P. Grabmayr, K. Livingston, I. J. D. Macgregor, J. C. Mcgeorge, R. O. Owens. 2005-06-14. Dependence of the $^{12}$C($\vecγ$,pd) reaction on photon linear polarisation. https://doi.org/10.1016/j.physletb.2007.02.013

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