Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

Full text (ua)

V. О. Zheltonozhskyi, D. E. Myznikov, A. M. Savrasov^*, V. I. Slisenko, D. M. Bondarkov

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

^*Corresponding author. E-mail address: asavrasov@kinr.kiev.ua

Abstract: The γ-spectra were measured of the radioactive material of the ZNPP which was irradiated by bremsstrahlung with end-point energy 18.5 MeV. Using the ratio of the ⁴⁷Ca and ⁵⁸Co activities, the cobalt and calcium mass ratio was determined. Using the obtained data and the measured ⁶⁰Co activity in the studied sample, a method for determining the ⁴¹Ca activity was developed.

Keywords: flux-weighted average yields, photoactivation method, γ-spectrometry, calcium, cobalt.

1. Building Materials. Cements for General Construction Purpose. Specifications. State Standards of Ukraine Б В.2.7-46:2010 (Kyiv: Ministry of Regional Development and Construction of Ukraine, 2011) 20 p. (Ukr) https://bud-kiev.com.ua/wp-content/uploads/2019/02/27-46-2010.pdf

2. V.A. Zheltonozhsky et al. Determination of the long-lived ¹⁰Be in construction materials of nuclear power plants using photoactivation method. J. Environ. Radioactivity 227 (2021) 106509. https://doi.org/10.1016/j.jenvrad.2020.106509

3. S.P. Kapica, V.N. Melekhin. The Microtron (London: Harwood Academic, 1978) 204 p. Google books

4. R.B. Firestone et al. Table of Isotopes. 8th ed. (New York, Wiley Interscience, 1996). https://www.wiley.com/en-us/Table+of+Isotopes%3A+1999+Update%2C+8th+Edition-p-9780471356332

5. J.F. Briesmeister. MCNP - a general Monte Carlo N-particle transport code. Report No. LA-12625-M. Los Alamos National Laboratory (1997). https://permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-13709-M

6. S. Agostinelli et al. GEANT4 – a simulation toolkit. Nucl. Instrum. Meth. A 506 (2003) 250. https://doi.org/10.1016/S0168-9002(03)01368-8

7. G.J. O'keefe et al. The photonuclear cross section of ⁴⁸Ca. Nucl. Phys. A 469 (1987) 239. https://doi.org/10.1016/0375-9474(87)90108-4

8. A.J. Koning, D. Rochman. Modern Nuclear Data Evaluation with the TALYS Code System. Nucl. Data Sheets 113 (2012) 2841. https://doi.org/10.1016/j.nds.2012.11.002

9. S.C. Fultz et al. Photoneutron cross sections for V⁵¹ and Co⁵⁹. Phys. Rev. 128 (1962) 2345. https://doi.org/10.1103/PhysRev.128.2345