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Detection limit for gold by radioisotopic x-ray analysis.

Authors
Burkhalter-PG; Marr-HE III
Source
Int J Appl Radiat Isot 1970 Jul; 21(7):395-403
NIOSHTIC No.
10010298
Abstract
The use of a ge(li-drifted) semiconductor detector and gamma-ray excitation with radioisotopic sources provides an x-ray analytical method that is advantageous for the determination of high-z elements in ores. The 122-kev gamma radiation of co57 was found to be an optimum energy for exciting gold k-radiation. The detection limit for gold was determined to be 30 to 40 ppm using both synthetic standards and analyzed gold ores. With a source strength of 60 mci, a 21-ppm detection limit is obtainable in 3-minute counting times. The sensitivity of the radioisotopic x-ray method for several other high-z elements was also determined. Using co57 for excitation, the detection limits for tungsten, lead, and uranium were 25, 40, and 60 ppm, respectively.
CODEN
IJARAY
Publication Date
19700701
Document Type
OP; Journal Article
Fiscal Year
1970
NTIS Accession No.
NTIS Price
Identifying No.
OP 146-70
Issue of Publication
7
ISSN
0020-708X
NIOSH Division
CPRC
Source Name
The International Journal of Applied Radiation and Isotopes
State
MD
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