Gamma-ray activity determination in large volume samples with a Ge-Li detector

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac50016a024· OSTI ID:7143625

Cesana, A; Terrani, M

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), Journal Name: Anal. Chem.; (United States) Vol. 49:8; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400103* -- Radiometric & Radiochemical Procedures-- (-1987)
440105 -- Radiation Instrumentation-- Radiometric Instruments-- (-1987)
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALKALI METALS
CHEMICAL ANALYSIS
EFFICIENCY
ELEMENTS
GAMMA DETECTION
GAMMA SPECTRA
GE SEMICONDUCTOR DETECTORS
LANTHANUM
LI-DRIFTED DETECTORS
LI-DRIFTED GE DETECTORS
MEASURING INSTRUMENTS
METALS
POTASSIUM
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION DETECTION
RADIATION DETECTORS
RADIOMETRIC ANALYSIS
RARE EARTHS
SEMICONDUCTOR DETECTORS
SPECTRA