Application of on-Line Laboratory Computer Analysis to Fast Neutron Activation Oxygen Determinations

The development of an on-line laboratory computer analysis system designed for routine high volume oxygen determinations is discussed. The system is based on the detection of 16N photopeaks from the 16O(n,p)16N reaction occurring during fast neutron irradiation. A system interface has been designed and constructed which is capable of controlling the Kaman 710 neutron generator, the sample transfer system, switching the BF3 beam monitor detector or NaI(Tl) detector outputs as required to a multichannel scaling MCA, and proper sequencing of the procedure. In addition, specific software has been developed for the control of the system during acquisition as well as evaluation of the MCS spectra generated.