PAA ResultsFromTheIAC

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

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)");

PAA_Research