Investigation of factors which lead to the background in the measurement of nitrogen by IVNAA

A major problem in the measurement of nitrogen in the body by in vivo neutron activation analysis is the size of the background. Investigations show that random summing of gamma rays in the range 4-7 MeV is a major contributor. By direct comparison, 252Cf is shown to be a better neutron source than...

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Veröffentlicht in:	Physics in medicine & biology 1989-01, Vol.34 (1), p.53-59
Hauptverfasser:	McNeill, K G, Borovnicar, D J, Krishnan, S S, Haiying, Wang, Waana, C, Harrison, J E
Format:	Artikel
Sprache:	eng
Schlagworte:	Analytical, structural and metabolic biochemistry Beryllium Biological and medical sciences Californium Fundamental and applied biological sciences. Psychology General aspects, investigation methods Humans Neutron Activation Analysis - methods Nitrogen - analysis Plutonium Proteins Radioisotopes Radiometry - methods
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Beschreibung
Zusammenfassung:	A major problem in the measurement of nitrogen in the body by in vivo neutron activation analysis is the size of the background. Investigations show that random summing of gamma rays in the range 4-7 MeV is a major contributor. By direct comparison, 252Cf is shown to be a better neutron source than Pu-Be in this regard. Data are presented on the contribution to the background of water and chloride in the body.
ISSN:	0031-9155 1361-6560
DOI:	10.1088/0031-9155/34/1/005