Effects of hydration on elemental sensitivities in neutron activation analysis using prompt and delayed gamma rays

1995 ◽  
Vol 192 (1) ◽  
pp. 39-44 ◽  
Author(s):  
M. B. Alamin ◽  
N. M. Spyrou
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Rays

Use of coincident and non-coincident gamma-rays in Compton suppression neutron activation analysis

2005 ◽  
Vol 263 (3) ◽  
pp. 817-821 ◽  
Author(s):  
S. Landsberger ◽  
S. R. Biegalski ◽  
D. J. O’Kelly ◽  
M. S. Basunia
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Rays ◽  
Compton Suppression

Neutron Activation Analysis of Nitrogen in Feedstuffs

1969 ◽  
Vol 52 (5) ◽  
pp. 953-956 ◽  
Author(s):  
W H Doty ◽  
D E Wood ◽  
E L Schneider
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Rays ◽  
Fast Neutrons ◽  
Total Analysis Time ◽  
Automated Method ◽  
Different Types ◽  
Total Analysis

Abstract The application of neutron activation analysis to the determination of nitrogen in various feeds and feedstuffs has been investigated. Samples were bombarded with fast neutrons to induce the 14N(n, 2n)13N reaction. 13N is a positron emitter with a 10 min half-life. The positrons annihilate in or near the sample to produce 0.51 MeV gamma rays, which are then counted in a detector system. Phosphorus and silicon interfere and are compensated for in the technique. A total of 419 individual runs were made on 53 samples covering 16 different types of materials. Total analysis time was 15 min per sample with a production rate of 12 samples per hr. The coefficient of variation of runs by the automated method typically ranged from 0.90 to 1.73 on the different sample groups. A good correlation between protein determined by the Kjeldahl technique and that determined by the automated method was demonstrated.

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.

Sign in / Sign up

Export Citation Format

Share Document