Determination of Selenium in coal fly ash via γ–γ coincidence neutron activation analysis
Makaleler > Tam Makale · 2016
Yazarlar: Mıchael Duncan YOHO, S. Landsberger
Journal of Radioanalytical and Nuclear Chemistry, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Scopus, 2016, cilt 307, ss 733-737
DOI: 10.1007/s10967-015-4209-z
Özet
The determination of selenium (Se) in fly-ash poses difficulties to the neutron activation analyst due to high Compton backgrounds as well as interference peaks from the 180Hf(n, γ)181Hf and 181Ta(n, γ)182Ta activation products. A methodology is presented to eliminate these interferences in geological samples via γ–γ coincidence. The methodology includes experimentally correcting for dead-time and random-summing. Random-coincidence gains which may lead to an over-estimation of concentration are corrected via post-acquisition analysis of the list-mode data. Calculated Se concentrations in fly-ash and other geological and biological reference materials agreed very well with the certified values.