The determination of nitrogen in zirconium by charged-particle activation analysis

Strijckmans, Karel; Mortier, Ronald; Vandecasteele, Carlo; Hoste, J.

doi:10.1007/bf01197981

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…In the case of 11 C, irradiation below the threshold energy ensures complete elimination of 15 O, elimination is only partial because a beam energy >16 MeV is required for a higher yield of 13 N. However, if activity counting is performed after a sufficiently long decay time, the significantly shorter half-life of 15 O compared with 13 N ensures adequate elimination of the interference. Another pure positronic emitter, 18 F, has its production threshold energy very close to 13 N, but owing to a significantly longer halflife, it has a significantly lower production rate. Moreover, fluorine in biological materials is usually present at much lower levels than nitrogen.…”

Section: Resultsmentioning

confidence: 99%

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Non-destructive determination of nitrogen in malting barleys by instrumental photon activation analysis and its comparison with the Dumas method

et al. 2018

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Instrumental photon activation analysis (IPAA) was used to measure the nitrogen content of malting barleys used in brewing and breeding in the Czech Republic. The study compares the fast and non‐destructive IPAA method with the classical Dumas method requiring combustion of the sample. The IPAA procedure for nitrogen assay is based on measuring the positron–electron annihilation γ line at 511 keV from the photoactivation product 13N, which is interfered with by other positron emitting nuclides. Interference from 15O can be eliminated by counting after a sufficient decay time. Interferences from 34mCl and 38K can be corrected via measuring their specific γ lines at 146.4 and 2167.7 keV, respectively. The IPAA procedure has been verified by analysis of several biological reference materials and is suitable for nitrogen measurement in cereals and other plant materials with a detection limit down to 10−2 wt%. Nitrogen contents in malting barleys ranged from 1.4 to 2.2 wt% and were dependent on the cereal variety and growth conditions (fertilizer use and chemical protection). Copyright © 2018 The Institute of Brewing & Distilling

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Section: Resultsmentioning

confidence: 99%

“…Prompt γ ‐ray neutron activation analysis utilizing the reaction 14 N(n, γ ) 15 N has often been used . Although another possibility is activation with charged particles . Photon activation analysis, in the present work used in an instrumental mode (IPAA), was one of the first nuclear radioanalytical methods used for nitrogen assay .…”

Section: Introductionmentioning

confidence: 97%