Photons outside the range of the detector. The results table notifying the user that the selected spectrum has More photons outside the range of the detector, a note will appear below If a radionuclide in the list emits one or Radionuclides with 0 photons do not contribute to the total GDR. \"-\" indicates that no photons are generated by the radionuclide's decay chain and thus cannot be detected by a gamma scintillation detector. At the bottom, the detector size and distance are followed by the GDR in cpm.Ī Field or Target Activity (CPM) result of For reference, the field activity (if more than one primary is selected) and the TAC are reprinted next to their individual conversions to cpm. The results table lists the primary selected radionuclides and their daughters, each daughter's fractional activity and the number of photons from each daughter. "Start Over" to begin another calculation. Click the "Back" button to go back a page or click.Of photons for a list of a radionuclide's photon The CPM calculator was developed for use with 0.5"x1", 1"x1", 2"x2",Īnd 3"x3" NaI crystal detectors. Enter the estimated distance between the source and the detector in.Select the size of the gamma scintillation detector. ![]() 2.3 Detector Information and Geometry of the Site ![]() Primary radionuclide on the contaminated surface and is used to find the radionuclide ratios in mixtures. The TAC may also be based on an ARAR such as theĥ pCi/g over background standard from 40 CFR 192. PRG, BPRG, SPRG, DCC, BDCC, and SDCC calculators. The TAC is the activity for which the result in cpm is desired. If multiple radionuclides are selected, enter the field activityĬoncentration (FAC) for each radionuclide.See Section 3.2 for more information.Įnter the target activity concentration (TAC) in pCi/cm 2 for each radionuclide. To select one of three natural decay series, find Truncated at the typical 'parent' radionuclides for man-made purposes. To calculate the parent and daughter activities manually,ĭeselect the box "Include daughter products."Ĭhains with very long-lived daughters have been Will automatically deselect the daughter, as it is inherently included. Remedial activity can be calculated using the PRG, BPRG, SPRG, DCC, BDCC, and SDCC calculators.ĭaughter products that reach secular equilibrium in a hundred to a When one or all radionuclides have been selected, click Moved together by highlighting while holding the shift or control ![]() On the ">" button to add it to the "Radionuclides of Interest" In the "Radionuclides (and daughter progeny)" list to highlight it and then click
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