1. A system for radiation detection comprising: a radiation event detector; two spectroscopic buffers, one holding long-term background and one holding the integrated detection event data received from the radiation event detector; means for precision peak identification receiving data from the two spectroscopic buffers and providing a concise list of corrected source peak locations and intensities; means for spectral region analysis receiving the detection event data; means for receiving data from the peak identification means and spectral region analysis means and having pattern recognition algorithms to identify a source isotope from, a standard library; and, alarm means responsive to output from the data receiving means upon exceeding a predetermined threshold for the source isotope.