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meshac A
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Am currently doing an undergraduate project work on 'estimation of radiological risk pose by U-238, th-232 and K-40 in rock samples' . The instrument I'll use are NaI(TI) crystal for scintilation were the gamma rays from the source(my rock samples) interact with the crystal through photoelectric effect, compton effect & pair production thus releasing photoelectrons, A photomultiplier tube (PMT) optically couple to the detector- to energize the photoelectrons from the detector, multichannel analyzer (MCA) plus an amplify with A-D converter, and a computer with the software winDAS installed to display the spectrum in histogram with count/second on the vertical axis and channel(energy in MeV) on horizontal axis.
The radionuclides present in the sample is identified if you trace it's energy on the spectrum, eg K-40 who's E is 1.460MeV will be traced.
Now, once the spectra corresponding to K-40 energy is identified how do i CALCULATE the ACTIVITY(Bq) of this nuclide and that of others to be identified?.
Thanks in advance!
The radionuclides present in the sample is identified if you trace it's energy on the spectrum, eg K-40 who's E is 1.460MeV will be traced.
Now, once the spectra corresponding to K-40 energy is identified how do i CALCULATE the ACTIVITY(Bq) of this nuclide and that of others to be identified?.
Thanks in advance!