The yield and average cross section for the reactions11B(p, n)11C,12C(p, )13N,13C(p, n)13N,
C(d, n)13N,14N(p, )11C,16O(p, )13N,16O(d, n)17F,16O(t, n)18F, and18O(p, n)18F have been measured in different compounds. The charged particles were created in the samples themselves either through recoil by scattering of 14 MeV neutrons off hydrogen and deuterium, or by the (n, t) reaction on6Li using thermal neutrons. The yields of reactions12C(d, n);16O(p, );16O(t, n) and18O(p, n) have been measured using proton, deuteron and triton spectra generated by 14 MeV neutrons in the reactions D(n, p)2n;6Li(n, d);7Li(n, d) and10B(n, d);7Li(n, t) and10B(n, t), respectively.
Authors:A. Chouak, P. Vuister, G. Paic, M. Berrada, and J. Csikai
A gamma-spectrometric method independent of radon escape for the determination of U and Ra in rock samples based on the 63
keV and 1001 keV as well as 185 keV lines is described and discussed. A simple experimental procedure is given for the determination
of the self-absorption factor. The method has been applied for the determination of uranium and radium in rock samples from
Morocco containing uranium between 17.5 wt.% and 0.026 wt.%. The limits of determination, at 95% confidence level and 10%
standard deviation, for the 63 keV and 1001 keV lines were found to be 0.075 wt.% and 0.62 wt.%, respectively, using samples
of 6 g and chosing 1 h measuring time.