Improvement of the Ca determination accuracy with k (0)-INAA using an HPGe coaxial detector with extended energy range efficiency calibration

0488732 - ÚJF 2019 RIV NL eng J - Článek v odborném periodiku
Kučera, Jan - Kubešová, Marie - Lebeda, Ondřej
Improvement of the Ca determination accuracy with k (0)-INAA using an HPGe coaxial detector with extended energy range efficiency calibration.
Journal of Radioanalytical and Nuclear Chemistry. Roč. 315, č. 3 (2018), s. 671-675. ISSN 0236-5731. E-ISSN 1588-2780.
[7th International K0-Users Workshop. Montreal, 03.09.2017-08.09.2017]
Grant CEP: GA ČR(CZ) GBP108/12/G108; GA MŠMT LM2015056
Institucionální podpora: RVO:61389005
Klíčová slova: k(0)-INAA * Ca determination * HPGe detector * High-energy efficiency calibration * Co-56 activity standard
Obor OECD: Analytical chemistry
Impakt faktor: 1.186, rok: 2018

We show that use of the radionuclide Co-56 for calibration of the full energy peak efficiency, epsilon, of a coaxial HPGe detector, in addition to the commonly employed set of activity standards (Ba-133, Am-241, Eu-152, Co-57, Cs-137, Y-88, Zn-65), affects significantly the epsilon values in the high energy region. This change resulted in substantial improvement of the accuracy of Ca determination by k (0)-INAA via the Ca-49 radionuclide, which emits predominantly the 3084 keV photons, as demonstrated by Ca results in NIST SRMs 1547 Peach Leaves, 1633b constituent elements in coal fly ash, and 2711 Montana II Soil.
Trvalý link: http://hdl.handle.net/11104/0283274