The ORTEC software ISOTOPIC™ is designed for use with high purity germanium (HPGe) detectors. This paper will examine the possibility of the application of ISOTOPIC™ software with a 3X3-inch sodium iodide (Nal) detector. The investigation into the application of the software to a low resolution detector was not an attempt to substitute HPGe measurements with Nal measurements, and there was no expectation of comparable performance. There was evidence from preliminary data, however, that there were field scenarios for which the advantages afforded by the use of a Nal detector coupled with analysis of 3×3 Nal spectra with ISOTOPIC™ could be quite useful.
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