The photoneutron cross section of 10B

Abstract The photoneutron cross section of 10 B was measured from threshold to 24.5 MeV with bremsstrahlung from a 30 MeV electron synchrotron using yield scanning techniques. Neutrons were detected by a high efficiency BF 3 -counter detection system. The cross section shows a split E1-giant resonance region with major maxima at 20.2 and 23.0 MeV and a very minor resonance at 17.0 MeV. Apart from these the cross section is void of structure.