Activity determination of 60Co and the importance of its beta spectrum - Archive ouverte HAL Access content directly
Journal Articles Applied Radiation and Isotopes Year : 2018

## Activity determination of 60Co and the importance of its beta spectrum

(1) , (1) , (2) , (1)
1
2
Karsten Kossert
• Function : Author
Xavier Mougeot
• Function : Author
Ole J. Naehle
• Function : Author

#### Abstract

The activity concentration of a $^{60}$Co solution was measured by means of two 4$\pi\beta$-$\gamma$ coincidence counting systems using a liquid scintillation counter and a proportional counter (PC) in the beta channel, respectively. Additional liquid scintillation measurements were carried out and CIEMAT/NIST efficiency tracing as well as the triple-to double coincidence ratio (TDCR) methods were applied to analyse the data. The last two methods require computed beta spectra to determine the counting efficiencies. The results of both 4$\pi\beta$-$\gamma$ coincidence counting techniques are in very good agreement and yield a robust reference value. The initial activity concentration determined with liquid scintillation counting was found to be significantly lower than the results from 4$\pi\beta$-$\gamma$ a coincidence counting. In addition, the results from TDCR and CIEMAT/NIST show some inconsistency. The discrepancies were resolved by applying new beta spectrum calculations for the dominant allowed beta transition of $^{60}$Co. The use of calculations which take screening effects as well as the atomic exchange effect into account leads to good agreement between all four methods; the combination of these techniques delivers an important validation of beta spectra.

#### Domains

Physics [physics] Nuclear Experiment [nucl-ex]

### Dates and versions

cea-01799862 , version 1 (11-02-2020)

### Identifiers

• HAL Id : cea-01799862 , version 1
• DOI :

### Cite

Karsten Kossert, Justyna Marganiec-Galazka, Xavier Mougeot, Ole J. Naehle. Activity determination of 60Co and the importance of its beta spectrum. Applied Radiation and Isotopes, 2018, 134 (SI), pp.212-218. ⟨10.1016/j.apradiso.2017.06.015⟩. ⟨cea-01799862⟩

### Export

BibTeX TEI Dublin Core DC Terms EndNote Datacite

68 View