NaI Detector Runs

Follow up graphs from previous meeting. Shows Coincidence plots for different ranges on Det B and Det C.

Count/hour vs Energy graphs are shown with x axes extended upto 10 MeV

Coincidence Plot for Shield 6

Figure 1: Equal range on both axes

Figure 2: Entire Range of Det C for 0 to 3 MeV of Det B

Figure 2: Entire Range of Det C for 0 to 1.75 MeV of Det B

Figure 2: Entire Range of Det C for 4.5 to 7.5 MeV of Det B

Counts per Hour vs Energy Graphs for Shield 6

Figure 2: Individual Graph of Det B

Figure 2: Individual Graph of Det C

Figure 2: Summed Energy Graph

Effectiveness of Collimator

Figure 1: Shield 6 and Collimator

Figure 2: Shield 6 and Collimator, Coincidence Plot

Neutron capture on Gd

No differences or peaks are really visible by eye. However, a trigger rate difference of 0.05 +/- 0.01 counts per second was observed for [0.5,10] PE for the summed detectors. This is the first time a positive rate difference, as well as one that is not within error of 0, has been observed.

Figure 3: Detector Sum Plots

Figure 4: Detector B	Figure 5: Detector C

Figure 6: Detector Sum, Subtracted Plot, (Source+Gd) - (Source)

Figure 7: Coincidence Subtracted Plot, (Source+Gd) - (Source), fine binning	Figure 8: Coincidence Subtracted Plot, (Source+Gd) - (Source), coarse binning