The integral cross section of the ${}^{12}\mathrm{C}(n,p){}^{12}\mathrm{B}$ reaction has been determined for the first time in the neutron energy range from threshold to several GeV at the n_TOF facility at CERN. The measurement relies on the activation technique with the $\beta$ decay of ${}^{12}\mathrm{B}$ measured over a period of four half-lives within the same neutron bunch in which the reaction occurs. The results indicate that model predictions, used in a variety of applications, are mostly inadequate. The value of the integral cross section reported here can be used as a benchmark for verifying or tuning model calculations.

• Received 12 May 2014

DOI:https://doi.org/10.1103/PhysRevC.90.021601