Gamma-ray activity determination in large volume samples with a Ge-Li detector
A method for the determination of the ..gamma..-ray activity of large volume sources is described and discussed. The efficiency of the detector is expressed as the product of an intrinsic, a geometrical, and a self-absorption factor. The first and the second terms are determined experimentally while the last is evaluated theoretically. The method has been applied to the determination of the ..gamma.. specific activity of natural potassium and natural lanthanum. For potassium a value of 3.21 +- 0.01 ..gamma../s g of K was obtained, while for /sup 138/La the partial half-lives for the photons of 789.1 and 1435.8 keV turned out to be 3.68 +- 0.14 x 10/sup 11/ y and 1.99 +- 0.03 x 10/sup 11/ y, respectively.
- Research Organization:
- Istituto di Ingegneria Nucleare, Milan
- OSTI ID:
- 7143625
- Journal Information:
- Anal. Chem.; (United States), Vol. 49:8
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
GAMMA DETECTION
LI-DRIFTED GE DETECTORS
LANTHANUM
RADIOMETRIC ANALYSIS
EFFICIENCY
POTASSIUM
GAMMA SPECTRA
ALKALI METALS
CHEMICAL ANALYSIS
ELEMENTS
GE SEMICONDUCTOR DETECTORS
LI-DRIFTED DETECTORS
MEASURING INSTRUMENTS
METALS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION DETECTION
RADIATION DETECTORS
RARE EARTHS
SEMICONDUCTOR DETECTORS
SPECTRA
400103* - Radiometric & Radiochemical Procedures- (-1987)
440105 - Radiation Instrumentation- Radiometric Instruments- (-1987)