Measurement of Oxygen Contamination in Titanium Alloy Ingots by Fast Neutron Activation Analysis,
SCIENCE APPLICATIONS INC SAN DIEGO CA
Pagination or Media Count:
The total oxygen content of five titanium samples was determined using activation analysis with fast neutrons. The method utilizes the nuclear reaction 016N,PN16. The produced 16N has a half-life of 7.2 seconds and decays by emitting 6.1 MeV gamma rays. Titanium samples of variable oxygen content and benzoic acid standards incapsulated in polyethylene vials were irradiated simultaneously with 14.3 MeV neutrons produced from a fast neutron generator. They were transferred to two Nal TL gamma-ray counting systems and were simultaneously counted. The 6.1 MeV gamma-ray counts produced by both titanium sample and standards were and 0.27 percent with relative error of less than 5 percent. The analysis is nondestructive, fast accurate, practically interference free, and can reach 100 ppm level.