−Table of Contents
Neutron Capture Efficiency Measurements
Important notes:
- All “and” trigger runs are not dead time limited
- All “or” trigger runs are dead time limited
Collimator 1: big shielding, nothing between source and Gd target
"and" trigger, 0.45 MeV threshold
Background, source
| Figure 1: | Figure 2: |
|---|---|
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Source, Gd
| Figure 3: | Figure 4: |
|---|---|
 |  |
Collimator 2: big shielding, 4 cm poly between source and Gd target
"and" trigger, 0.45 MeV threshold
Background, source
| Figure 5: | Figure 6: |
|---|---|
 |  |
Source, Gd
| Figure 7: | Figure 8: |
|---|---|
 |  |
Collimator 2: big shielding, 4 cm poly between source and Gd target
"or" trigger, 1.5 MeV threshold
Background, source
| Figure 9: | Figure 10: |
|---|---|
 |  |
Source, Gd
| Figure 11: | Figure 12: |
|---|---|
 |  |
Source, Poly
| Figure 13: | Figure 14: |
|---|---|
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Analysis
- The negative regions of Figures 4 and 6 could be where neutron that captured in the detectors or on something else were instead captured on Gd, but the resulting signals weren't measured.