Measurement of 14 MeV neutron flux from D-T neutron generator using activation analysis

Flux measurement of an accelerator based D-T neutron generator was achieved by the activation technique. The neutron generator can produce maximum neutron yield of 1.9 × 10¹⁰ n/sec at the Tritium-target. For the measurement of 14 MeV neutron flux, ⁶³Cu(n, 2n)⁶²Cu and ²⁷Al(n, p)²⁷Mg reactions are most suitable because of their higher threshold energies 11.03 MeV and 3.25 MeV respectively. Measurement of γ-ray activities from ⁶²Cu and ²⁷Mg is used to measure 14 MeV neutron flux. NaI(Tl) scintillation and High Purity Germanium (HPGe) detectors were used for the γ-radiation measurement from ⁶²Cu and ²⁷Mg respectively. In this paper the 14 MeV neutron flux measurement by ⁶³Cu and ²⁷Al activation is discussed. The method could also serve as a diagnostics tool for measurement of high-energy neutron flux.