Measurement of a Cross Section for the²⁷Al(p, 3pn)²⁴Na Reaction at 12 GeV

Abstract

The cross section for the 27 Al(p, 3pn) 24 Na reaction was measured at 12 GeV in order to establish the calibration method of intensity monitors of the 12 GeV primary proton beam at KEK. The measured cross section of 8.1±0.9 mb is consistent with other measurements performed in energy regions close to 12 GeV.