Improvement of sensitivity in neutron activation analysis by selective absorption of high-intensity low-energy gamma-rays

1982 ◽  
Vol 72 (1-2) ◽  
pp. 295-304 ◽  
Author(s):  
G. Kennedy ◽  
L. Zikovsky
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Rays ◽  
High Intensity ◽  
Low Energy ◽  
Selective Absorption ◽  
Energy Gamma

Evaluation of the uncertainty associated with sample holders in NAA measurements in LAN/IPEN

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
Guilherme Soares Zahn ◽  
Regina Beck Ticianelli ◽  
Mitiko Saiki ◽  
Frederico Antonio Genezini
Keyword(s):  
Stainless Steel ◽  
Neutron Activation Analysis ◽  
Neutron Activation ◽  
Gamma Rays ◽  
Experimental Error ◽  
Steel Sample ◽  
Low Energy ◽  
Stainless Steel Sample ◽  
Gamma Emission ◽  
Energy Gamma

In IPEN’s Neutron Activation Laboratory (LAN/IPEN), thin stainless steel sample holders are used for gamma spectrometry in NAA measurements. This material is very practical, but its chemical composition may be troublesome, as it presents large amounts of elements with intermediate atomic number, with attenuation factors for low-energy gamma-rays that must not be neglected. In this study, count rates obtained using different sample holders were compared. To accomplish that, an Am-241 source, with 59-keV gamma emission, was used so that low-energy gamma attenuation differences can be determined. Moreover, in order to study the energy dependence of these differences, a Ho-166m source was also used. From these results, it was possible to analyze the experimental error associated to the variations between sample holders, with the aim of introducing an addictive term to the uncertainty analysis of comparative Neutron Activation Analysis results.

Determination of palladium by chemical neutron activation analysis using low energy photon spectrometry

1999 ◽  
Vol 240 (3) ◽  
pp. 877-881
Author(s):  
A. G. C. Nair ◽  
A. V. R. Reddy ◽  
R. N. Acharya ◽  
P. P. Burte ◽  
S. B. Manohar
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Low Energy ◽  
Energy Photon
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