Direct measurement of U-238 and disequilibrium state in geological samples by low energy scintillation gamma spectroscopy

1992 ◽  
Vol 42 (2-3) ◽  
pp. 345-350 ◽  
Author(s):  
Günseli Yaprak ◽  
Güngör Yener
Keyword(s):  
Direct Measurement ◽  
Gamma Spectroscopy ◽  
Low Energy ◽  
Geological Samples ◽  
Scintillation Gamma

Direct measurement of the position accuracy for low energy X-ray photons with a pnCCD

2017 ◽  
Vol 12 (02) ◽  
pp. P02005-P02005 ◽  
Author(s):  
S. Ihle ◽  
P. Holl ◽  
D. Kalok ◽  
R. Hartmann ◽  
H. Ryll ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Low Energy ◽  
X Ray ◽  
Position Accuracy

Development of a New Method to Reduce the Measurement Uncertainties in Gamma-Ray Spectroscopy of Bituminized Radioactive Waste Drums

2001 ◽  
Author(s):  
Bertrand Perot ◽  
Jean-Luc Artaud ◽  
Bernard Chabalier ◽  
Pierre Bonifay ◽  
Sébastien Bernard ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Chemical Composition ◽  
Radioactive Waste ◽  
Experimental Validation ◽  
Gamma Ray ◽  
Gamma Spectroscopy ◽  
Low Energy ◽  
The Matrix ◽  
Measurement Uncertainties ◽  
Waste Drums

Abstract The determination by gamma spectroscopy of the activity of radionuclides emitting low energy radiation (less than 200 keV) in bituminized waste drums can be affected by significant uncertainty if the chemical composition of the matrix is not well-known. Indeed, some elements with high atomic numbers (Z) can significantly modify the absorption of these radiations. The CEA has therefore studied, using numerical simulation, the feasibility of a method which would take into account this effect, based on the analysis of the gamma spectra continuum due to Compton scattering (1). This article describes an experimental validation of the simulations and of the method.

scholarly journals Direct measurement of astrophysical factor S(E) and screening potential for Be9(p,α)6Li reaction at low energy

2018 ◽  
Vol 785 ◽  
pp. 262-267 ◽  
Author(s):  
Kaihong Fang ◽  
Qian Zhang ◽  
Bingjun Chen ◽  
Zhengwei Zhang ◽  
Qiang Wang ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Low Energy ◽  
Astrophysical Factor

scholarly journals Determination of Americium-241 in sediments by gamma spectroscopy

2000 ◽  
Vol 65 (5-6) ◽  
pp. 451-456
Author(s):  
Mirjana Ristic ◽  
Sandro Degetto ◽  
Teodor Ast
Keyword(s):  
Gamma Spectroscopy ◽  
Global Fallout ◽  
Low Energy ◽  
Radiochemical Method ◽  
Energy Gamma ◽  
Concentration Step ◽  
Series Of Experiments ◽  
Gamma Method ◽  
Optimum Separation

A radiochemical method is given for the determination of Am-241 from the global fallout in sediments. The concept of a concentration step to separate Am-241 from the bulk of the sample (1.2 kg wet) by coprecipitation followed by low energy gamma spectroscopy was investigated. A series of experiments with tracer added was performed to measure the recovery of americium by coprecipitation. Also, a number of real samples without tracer were examined and the conditions for the optimum separation are given. The applied gamma method and the conventional, accurate, but tedious, aplha technique via 243Am, which is usually applied for the determination of Am-241, agreed mostly within 10 %.

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