PAA ResultsFromTheIAC
Nickel Normaization
Flux Rates on Jack
Jack Photon Flux
Jack Neutron Flux
Scotch Tape -vs- Kapton tape
A 20 MeV electron was used to make a bremsstrahlung beam that impinged a sample of regular Scotch Tape and Kapton tape. Both tapes had similar areas of 2.5 x 3 cm. The Kapton had twice as much mass as the Scotch (0.1247 g -vs 0.0699 g).
The scotch taper became brittle after 4 hours of irradiation on the 25 N machine.
Below is an uncalibrated spectrum using Thorium rods. Lines should appear at 238.8,338.8, 511, 583.4, 911.2, and 2614.6 keV
| Channel | Energy (keV) |
| 242 | 238.8 |
| 342 | 338.8 |
| 514 | 511 |
| 586 | 583 |
| 914 | 911.2 |
| 2617 | 2614.6 |
slope=1.0003 +/- 0.000156023 y-intercept=-3.12645 +/- 0.185346
MPA->Draw("-3.12645+1.0003*evt.Chan>>(8000,0,8000)");
Scotch tape run was 6663.4 seconds long (MPA->Draw("-3.12645+1.0003*evt.Chan>>NScotchTape(8000,0,8000)","0.00015");)
Kapton Tape run was 488.44 seconds long (MPA->Draw("-3.12645+1.0003*evt.Chan>>NKaptonTape(8000,0,8000)","0.0020473344");)
HEU disks
A 20 MeV electron was used to make a bremsstrahlung beam that impinged HEU disks
Below is an uncalibrated spectrum using Thorium rods on Detector D. Lines should appear at 238.8,338.8, 511, 583.4, 911.2, and 2614.6 keV
The HEU samples were measured on two different HpGe detectors that has similar efficiencies. Get B was used for the Unirradiate sample and Detector D for the Irradiated HEU disk.
Det D calibrations
| Channel | Energy (keV) |
| 236 | 238.8 |
| 334 | 338.8 |
| 505 | 511 |
| 576 | 583 |
| 901 | 911.2 |
| 2586 | 2614.6 |
slope=1.0108 +/- 0.000328475 y-intercept=0.6533 +/- 0.385247
MPA->Draw("0.6533+1.0108*evt.Chan>>(8000,0,8000)");
HEU comparison Before and After irradiation
Uniradiated HEU sample was measured for 2671.8 seconds
MPA->Draw("-3.12645+1.0003*evt.Chan>>NHEUback(2000,0,8000)","0.0003742795");
Iradiated HEU sample was measured overnight for 50554.469 seconds (14 hours)
MPA->Draw("0.6533+1.0108*evt.Chan>>NIradHEU(2000,0,8000)","0.00001978064");