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Characterization of 226Ra Point Source and Analysis Its Daughter Radionuclides |
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PP: 75-81 |
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doi:10.18576/jrna/060111
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Author(s) |
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M. Joynal Abedin,
A. A. S. Zamil,
Y. N Jolly,
S. Akter,
M. O. Rahman,
M. S. Islam,
Sk. A. K. Arafin,
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Abstract |
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| The ‘Gamma Spectroscopy Setup’ calibration is essential for comparatively better gamma energy detection and analysis. Standard calibration sources are available as small deposits on thin backing materials so that they may closely approximate non-absorbing point source. However, radioactive samples to be measured often have non-negligible volume and mass, gamma rays can be attenuated by self-absorption within the sample material itself. In such cases, correction must be made for this attenuation if an accurate determination of gamma ray emission rate from the entire sample is needed. Accordingly, separate spectra for each source provides results that are simple to interact, but the calibration process is the time consuming and tedious. The substitution of a single source that emits many different gamma-ray energies is a tempting alternative because only a single calibration spectrum need be recorded and analyzed. The problem of interference between multiple responses become much more severe, however, and if precise results are to be obtained, more sophisticate methods of determining peak area must be used that take into account those interference effects. The point source 226Ra has been taken under experiment for its characterization assessment. The daughter radionuclides obtained mainly 214Pb, 214Bi, 222Rn, 218Po, 218At, 218Rn, 218Po, 210Tl, 210Pb, 210Bi, etc. Efficiency calibration has been also done. The spectrum taken several times may be compared with each other to assess those changes of spectra for the time being. |
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