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- Author or Editor: I. Celenk x
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Abstract
A neutron activation method of analysis for the determination of alumina and silica in geological samples has been developed and applied to some geological standards. Samples of about 4 g /in Cd shield/ were irradiated in the immediate vicinity of a 5 Ci Pu–Be source. Gamma spectra were acquired using a 7.5 cm × 7.5 cm NaI/Tl/ detector. The irradiate-transfer-count sequence was repeated five times in succession, counts being taken cumulatively. Recycling of the sample produced improved counting statistics and better reproducibility.
Abstract
Using vanadium as the activable element, an indirect cyclic neutron activation technique for determination of boron in aqueous solutions has been developed. Experimental arrangement consisted of a 5 Ci Pu–Be based neutron irradiator and a 7.5 cm × 7.5 cm NaI/Tl/ detector. Recycling of vanadium between the irradiation source and the detector produced improved detection limit and sensitivity.
Abstract
In this study, the total thermal neutron macroscopic and microscopic cross sections of V, Co, Cu, In, Dy and Au were measured using neutron self-absorption properties. Pure foils of these elements with various thicknesses were irradiated using a 5 Ci238Pu–Be source. After the irradiation, the gamma-spectra of their radionuclides were recorded by an HpGe detector. The gamma-photopeak areas of interest were determined by evaluating the gamma-spectra obtained from the foils. They were plotted as a function of foil thickness for each element. Then a non-linear least-squares fitting method was applied to the functions, and the total thermal neutron macroscopic and microscopic cross sections of V, Co, Cu, In, Dy and Au were obtained.
Abstract
Recent developments at Ankara Nuclear Research and Training Center as regards some fundamental aspects of cyclic activation were summarized. From a point of view of pure application, a comparison of cyclic and conventional activation analyses of gold using non-reactor neutron sources was also presented.
