[Determination of nitrogen, fluorine and phosphorus in osseous tissues by photonuclear activation].

A method of instrumental photonuclear activational analysis is developed for estimation of nitrogen, fluorine and phosphorus in bone tissue samples. The irradiation with maximal energy 15.6 MeV, obtained on linear accelerator of electrons LUE-25 RIMR AMN USSR, was used for activation. Estimations were carried out by the relative method with recording the intensity of positron radiation of 13N, 18F and 30P in samples and standards by means of device for gamma-gamma-coincidence. In chosen regimens of the analysis the statistical errors of nitrogen and phosphorus estimation did not esceed 1.5%, of fluorine-5%; the sensitivity of the method for nitrogen was found to be 0.06% for fluorine-0.006%, for phosphorus-0.12%; on analysis of recovery the relative standard deviation in results accounted for nitrogen-5.4%, for fluorine-6.7% for phosphorus 6.2%. Correctness in concentrations of the elements, estimated by the method described, correlated with the data, obtained in activation with reactor neutrons and with 14MeV generator neutrons.