| Popis: |
Measurements were made on delayed neutrons emitted by the cooling water of a beam dump for GeV electrons produced by the accelerator at the Stanford Linear Accelerator Center. A 3He spectrometer was used to measure the energy spectrum and a BF3 counter was used to measure the half-life of the neutron activity. The spectrum showed neutron groups at 383, 1170 and 1700 keV and the possibility of another group at 2070 keV. The three lower groups, in combination with the measured half-life of 4.4±0.2 s, indicate that most of the delayed neutrons were emitted by 17N produced by the 18O(gg, p)17N reaction. |
