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Title: Precise trace rare earth analysis by radiochemical neutron activation

Abstract

A rare earth group separation scheme followed by normal Ge(Li), low energy photon detector (LEPD), and Ge(Li)-NaI(Tl) coincidence-noncoincidence spectrometry significantly enhances the detection sensitivity of individual rare earth elements (REE) at or below the ppB level. Based on the selected ..gamma..-ray energies, normal Ge(Li) counting is favored for /sup 140/La, /sup 170/Tb, and /sup 169/Yb; LEPD is favored for low ..gamma..-ray energies of /sup 147/Nd, /sup 153/Sm, /sup 166/Ho, and /sup 169/Yb; and noncoincidence counting is favored for /sup 141/Ce, /sup 143/Ce, /sup 142/Pr, /sup 153/Sm, /sup 171/Er, and /sup 175/Yb. The detection of radionuclides /sup 152m/Eu, /sup 159/Gd, and /sup 177/Lu is equally sensitive by normal Ge(Li) and noncoincidence counting; /sup 152/Eu is equally sensitive by LEPD and normal Ge(Li); and /sup 153/Gd and /sup 170/Tm is equally favored by all the counting modes. Overall, noncoincidence counting is favored for most of the REE. Precise measurements of the REE were made in geological and biological standards.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest Lab., Richland, WA (USA)
OSTI Identifier:
6256351
Report Number(s):
PNL-SA-9143; CONF-8106153-1
ON: DE81030009; TRN: 81-016804
DOE Contract Number:
AC06-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: Modern trends in neutron activation conference, Toronto, Canada, 5 Jun 1981
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CERIUM; ACTIVATION ANALYSIS; SEPARATION PROCESSES; ERBIUM; EUROPIUM; GADOLINIUM; HOLMIUM; LANTHANUM; LEAVES; LIVER; LUTETIUM; MAIZE; NEODYMIUM; PRASEODYMIUM; SAMARIUM; SOILS; TERBIUM; THULIUM; VEGETABLES; YTTERBIUM; NEUTRON REACTIONS; QUANTITATIVE CHEMICAL ANALYSIS; BARYON REACTIONS; BODY; CEREALS; CHEMICAL ANALYSIS; DIGESTIVE SYSTEM; ELEMENTS; FOOD; GLANDS; GRAMINEAE; GRASS; HADRON REACTIONS; METALS; NUCLEAR REACTIONS; NUCLEON REACTIONS; ORGANS; PLANTS; RARE EARTHS; 400101* - Activation, Nuclear Reaction, Radiometric & Radiochemical Procedures; 400102 - Chemical & Spectral Procedures

Citation Formats

Laul, J.C., Lepel, E.A., Weimer, W.C., and Wogman, N.A. Precise trace rare earth analysis by radiochemical neutron activation. United States: N. p., 1981. Web.
Laul, J.C., Lepel, E.A., Weimer, W.C., & Wogman, N.A. Precise trace rare earth analysis by radiochemical neutron activation. United States.
Laul, J.C., Lepel, E.A., Weimer, W.C., and Wogman, N.A. 1981. "Precise trace rare earth analysis by radiochemical neutron activation". United States. doi:.
@article{osti_6256351,
title = {Precise trace rare earth analysis by radiochemical neutron activation},
author = {Laul, J.C. and Lepel, E.A. and Weimer, W.C. and Wogman, N.A.},
abstractNote = {A rare earth group separation scheme followed by normal Ge(Li), low energy photon detector (LEPD), and Ge(Li)-NaI(Tl) coincidence-noncoincidence spectrometry significantly enhances the detection sensitivity of individual rare earth elements (REE) at or below the ppB level. Based on the selected ..gamma..-ray energies, normal Ge(Li) counting is favored for /sup 140/La, /sup 170/Tb, and /sup 169/Yb; LEPD is favored for low ..gamma..-ray energies of /sup 147/Nd, /sup 153/Sm, /sup 166/Ho, and /sup 169/Yb; and noncoincidence counting is favored for /sup 141/Ce, /sup 143/Ce, /sup 142/Pr, /sup 153/Sm, /sup 171/Er, and /sup 175/Yb. The detection of radionuclides /sup 152m/Eu, /sup 159/Gd, and /sup 177/Lu is equally sensitive by normal Ge(Li) and noncoincidence counting; /sup 152/Eu is equally sensitive by LEPD and normal Ge(Li); and /sup 153/Gd and /sup 170/Tm is equally favored by all the counting modes. Overall, noncoincidence counting is favored for most of the REE. Precise measurements of the REE were made in geological and biological standards.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1981,
month = 6
}

Conference:
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