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Studies on the instrumental neutron activation analysis by cadmium ratio method and pair comparator method

Journal Article:

Abstract

The cadmium ratio method and pair comparator method provide a solution for the effects on the effective activation factors resulting from the variation of neutron spectrum at different irradiation positions as usually encountered in the single comparator method. The relations between the activation factors and neutron spectrum in terms of cadmium ratio of the comparator Au or of the activation factor of Co-Au pair for the elements, Sc, Cr, Mn, Co, La, Ce, Sm, and Th have been determined. The activation factors of the elements at any irradiation position can then be obtained from the cadmium ratio of the comparator and/or the activation factor of the comparator pair. The relations determined should be able to apply to different reactors and/or different positions of a reactor. It is shown that, for the isotopes /sup 46/Sc, /sup 51/Cr, /sup 56/Mn, /sup 60/Co, /sup 140/La, /sup 141/Ce, /sup 153/Sm and /sup 233/Pa, the thermal neutron activation factors determined by these two methods were generally in agreement with theoretical values. Their I/sub 0//sigma/sub th/ values appeared to agree with literature values also. The methods were applied to determine the contents of elements Sc, Cr, Mn, La, Ce, Sm, and Th in U.S.G.S. Standard Rock  More>>
Publication Date:
Dec 01, 1977
Product Type:
Journal Article
Reference Number:
ERA-04-019863; EDB-79-031624
Resource Relation:
Journal Name: Nucl. Sci. J. (Taiwan); (Taiwan); Journal Volume: 14:4
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACTIVATION ANALYSIS; CERIUM; CHROMIUM; COBALT; LANTHANUM; MANGANESE; PROTACTINIUM; SAMARIUM; SCANDIUM; MULTI-ELEMENT ANALYSIS; ROCKS; ACTINIDES; CHEMICAL ANALYSIS; ELEMENTS; METALS; RARE EARTHS; TRANSITION ELEMENTS; 400101* - Activation, Nuclear Reaction, Radiometric & Radiochemical Procedures
OSTI ID:
6760295
Research Organizations:
Inst. of Nuclear Energy Research, Lungtan, Taiwan
Country of Origin:
Taiwan, Province of China
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: HTKHA
Submitting Site:
TIC
Size:
Pages: 21-33
Announcement Date:
Mar 01, 1979

Journal Article:

Citation Formats

Chao, H E, Lu, W D, and Wu, S C. Studies on the instrumental neutron activation analysis by cadmium ratio method and pair comparator method. Taiwan, Province of China: N. p., 1977. Web.
Chao, H E, Lu, W D, & Wu, S C. Studies on the instrumental neutron activation analysis by cadmium ratio method and pair comparator method. Taiwan, Province of China.
Chao, H E, Lu, W D, and Wu, S C. 1977. "Studies on the instrumental neutron activation analysis by cadmium ratio method and pair comparator method." Taiwan, Province of China.
@misc{etde_6760295,
title = {Studies on the instrumental neutron activation analysis by cadmium ratio method and pair comparator method}
author = {Chao, H E, Lu, W D, and Wu, S C}
abstractNote = {The cadmium ratio method and pair comparator method provide a solution for the effects on the effective activation factors resulting from the variation of neutron spectrum at different irradiation positions as usually encountered in the single comparator method. The relations between the activation factors and neutron spectrum in terms of cadmium ratio of the comparator Au or of the activation factor of Co-Au pair for the elements, Sc, Cr, Mn, Co, La, Ce, Sm, and Th have been determined. The activation factors of the elements at any irradiation position can then be obtained from the cadmium ratio of the comparator and/or the activation factor of the comparator pair. The relations determined should be able to apply to different reactors and/or different positions of a reactor. It is shown that, for the isotopes /sup 46/Sc, /sup 51/Cr, /sup 56/Mn, /sup 60/Co, /sup 140/La, /sup 141/Ce, /sup 153/Sm and /sup 233/Pa, the thermal neutron activation factors determined by these two methods were generally in agreement with theoretical values. Their I/sub 0//sigma/sub th/ values appeared to agree with literature values also. The methods were applied to determine the contents of elements Sc, Cr, Mn, La, Ce, Sm, and Th in U.S.G.S. Standard Rock G-2, and the results were also in agreement with literature values. The cadmium ratio method and pair comparator method improved the single comparator method, and they are more suitable to analysis for multi-elements of a large number of samples.}
journal = {Nucl. Sci. J. (Taiwan); (Taiwan)}
volume = {14:4}
journal type = {AC}
place = {Taiwan, Province of China}
year = {1977}
month = {Dec}
}