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Journals
Materials and Geoenvironment
Volume 68 (2021): Issue 1 (March 2021)
Open Access
Calibration of a 5x5 NaI(Tl) for Prompt In-Situ Gamma-ray Spectrometry System
P.E. Biere
P.E. Biere
,
J.O. Aina
J.O. Aina
,
M.O. Olaoye
M.O. Olaoye
and
A.O. Mustapha
A.O. Mustapha
| Aug 06, 2023
Materials and Geoenvironment
Volume 68 (2021): Issue 1 (March 2021)
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Article Category:
Original Scientific Article
Published Online:
Aug 06, 2023
Page range:
1 - 5
Received:
May 05, 2021
Accepted:
Aug 16, 2021
DOI:
https://doi.org/10.2478/rmzmag-2021-0001
Keywords
Gamma ray spectrometry
,
NaI(Tl) detector
,
window analysis method
,
calibration factor
© 2021 P.E. Biere et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Figure 1:
Spectrum obtained during calibration showing gamma lines of the primordial radionuclides.
In-situ conversion factors.
Radionuclide
N
o
∅
(
cps
γ
m
−
2
s
−
1
)
{{{N_o}} \over \emptyset}\left({{{cps} \over {\gamma {m^{- 2}}{s^{- 1}}}}} \right)
∅
A
(
γ
m
−
2
s
−
1
Bqkg
−
1
)
{\emptyset \over A}\left({{{\gamma {m^{- 2}}{s^{- 1}}} \over {Bqk{g^{- 1}}}}} \right)
N
f
N
o
{{{N_f}} \over {{N_o}}}
N
f
A
(
cps
Bqkg
−
1
)
{{{N_f}} \over A}\left({{{cps} \over {Bqk{g^{- 1}}}}} \right)
40
K
0.013
0.433
0.895
0.005
238
U
0.008
0.616
1.647
0.008
232
Th
0.001
1.451
1.045
0.002