Cross Section forC12(α,αn)C11at 920 MeV

Abstract

Plastic scintillators were exposed in the external 920-MeV $\alpha$-particle beam at the 184-in. cyclotron at Lawrence Radiation Laboratory. The beam-flux monitor was Ilford 100-μ L4 pellicles. The cross section for ${\mathrm{C}}^{12}(\alpha ,\alpha n){\mathrm{C}}^{11}$ was found to be 49.4 ± 1.8 mb.