Performance of the True Coincidence Correction Method in GammaVision

While methods for correcting peak areas for point sources have been well known for some time, true coincidence correction for volume sources such as Marinelli beakers and bottles have not been previously implemented because of the complexity of self-absorption and the subsequent cascade summing with partial peak energies. A new method was developed that (a) solves the problem of volume sources and (b) provides a one-step calibration method to make implementation by the user straightforward; this method for correction of the peak areas was implemented in GammaVision. The method was tested by using several beakers and bottles as well as a point source.