The following are some examples of evaluating point sources. This and other source configurations are discussed on the following pages. Figure shows the cells that were above the CDV at theend of the counting time. This is expected based on the theory of proportional counters. Note in Figure that the higher activity cells are foundin columns C through F and wires 6 through 8.
Figure shows the screen during the collection of thedata.
Figure shows the cells that were above the CDVat the end of the counting time. Note that all three sources were found, even though the amounts and energies wereconsiderably different. This attests to the excellent positional determination capabilitiesof the Helgeson system. There are 6 columns at 0.75inches per column, or 4.5 inches. There are 4 rows at 0.75 inches per row, or 3.0inches.