UnderGraduate Neutron Correlations Lab
NaI detector setup
Creating ROOT data files
source ~/CODA/2.6.2/setup
source src/root/root-5.34.00/bin/thisroot.csh
/home/daq/CODA/CODAreader/ROOT_V5.34/PAA/evio2nt -fr6815.dat > /dev/null
Analyzing ROOT data file
root -l r8735.root
to draw a histogram for Peak ADC channel 4
PAA->Draw("PADC.PADC785N[4]>>(4096,0,4096)")
To scale the histogram using an energy calibration of 0.45 keV/channel
PAA->Draw("PADC.PADC785N[4]*0.45>>(4096,0,4096)")
To save thehistogram under the name Cs137
PAA->Draw("PADC.PADC785N[4]*0.45>>Cs137(4096,0,4096)")
To normalize the histogram by a run time of 2600 seconds
1/3600=0.0002778
Cs137->Scale(0.0002778) Cs137->Draw();
run 6816 background (~300Hz) 1/47 = 0.021277
run 6817 signal (~600 Hz) 1/75 =0.013333
https://wiki.iac.isu.edu/index.php/File:NaI_Cs137_4-22-21.png
data 4/26/21
| Run Number | configuration |
| 6819 | Cs-137 source at location of Cf-252, no Cf-252 or Cd target in apparatus |
| 6820 | start time: 16:04:33 04/26/2021 Cs-137 out, Cd in , Cf-252 out. NaI at closest possible. stop time: 16:08:34 (241 seconds) |
| 6821 | start time: 16:11:49 04/26/2021 Cs-137 out, Cd in , Cf-252 in , Poly thermalizer 1/2" in. NaI at closest possible. stop time: 16:22:52 (663 sec) |
| 6822 | start time: 16:23:54 04/26/2021 Cs-137 out, Cd in , Cf-252 out , Poly thermalizer 1/2" in. NaI at closest possible. stop time:16:34:38 (673 sec) |
| 6823 | start time: 16:35:44 04/26/2021 Cs-137 out, Cd out , Cf-252 out , Poly thermalizer 1/2" in. NaI at closest possible. stop time:16:46 |
| 6824 | start time: 16:35:44 04/26/2021 Cf-252 in , Poly thermalizer 1/2" in. ,Cd in sandwhich , NaI at closest possible. stop time:16:46 |
| 6825 | start time: 16:53:55 04/26/2021 Cf-252 in 6 in away, 1" lead, , Poly thermalizer 1/2" in. ,Cd in sandwhich , NaI at closest possible. stop time:16:54:58 |
| 6826 | start time: 16:57:39 04/26/2021 Cf-252 in 6 in away, 2" lead, , Poly thermalizer 1/2" in. ,Cd in sandwhich , NaI at closest possible. stop time:16:58:49 |
| 6827 | start time: 16:59:13 04/26/2021 Cf-252 in 6 in away, 2" lead, , Poly thermalizer 1/2" in. ,Cd OUT sandwhich , NaI at closest possible. stop time:17:00:15 |
data 5/3/21
Set up:
- Lead: Detector surrounded on 4 sides by 1" lead. Front end up to 4" of lead. Back end exposed.
- Poly: Up to 40cm of green poly between lead and source (line-of-sight). No poly elsewhere.
| Run Number | configuration |
| 6829 | 05/03/2021, No source, 40cm poly, 4" lead.
start time: 13:10:43, end time: 13:17:55, duration: 432 s, counts=10164 counts/sec: 23.528 |
| 6830 | 05/03/2021, Source at 52cm from detector face, 40cm poly, 4" lead.
start time: 13:20:11, end time: 13:27:21, duration: 430 s, counts=10459 counts/sec: 24.323 |
| 6831 | 05/03/2021, Source at 52cm from detector face, 35cm poly, 4" lead.
start time: 14:08:49, end time: 14:16:17, duration: 448 s, counts=11007 counts/sec: 24.569 |
| 6832 | 05/03/2021, Source at 52cm from detector face, 30cm poly, 4" lead.
start time: 14:17:28, end time: 14:24:21, duration: 413 s, counts=10128 counts/sec: 24.523 |
| 6833 | 05/03/2021, Source at 52cm from detector face, 25cm poly, 4" lead.
start time: 14:25:48, end time: 14:32:37, duration: 409 s, counts=10112 counts/sec: 24.723 |
| 6834 | 05/03/2021, Source at 52cm from detector face, 20cm poly, 4" lead.
start time: 14:34:10, end time: 14:41:01, duration: 411 s, counts=10210 counts/sec: 24.841 |
| 6835 | 05/03/2021, Source at 52cm from detector face, 15cm poly, 4" lead.
start time: 14:42:11, end time: 14:48:59, duration: 408 s, counts=10181 counts/sec: 24.953 |
| 6836 | 05/03/2021, Source at 52cm from detector face, 10cm poly, 4" lead.
start time: 14:49:59, end time: 14:56:45, duration: 406 s, counts=10344 counts/sec: 25.478 |
| 6837 | 05/03/2021, Source at 52cm from detector face, 5cm poly, 4" lead.
start time: 14:57:52, end time: 15:04:39, duration: 407 s, counts=10890 counts/sec: 26.757 |
| 6838 | 05/03/2021, Source at 52cm from detector face, 0cm poly, 4" lead.
start time: 15:05:46, end time: 15:12:49, duration: 423 s, counts=12380 counts/sec: 29.267 |
| 6839 | 05/03/2021, Source at 52cm from detector face, 0cm poly, 3" lead.
start time: 15:15:28, end time: 15:21:07, duration: 339 s, counts=10267 counts/sec: 30.286 |
| 6840 | 05/03/2021, Source at 52cm from detector face, 0cm poly, 2" lead.
start time: 15:22:29, end time: 15:28:02, duration: 333 s, counts=11390 counts/sec: 34.204 |
| 6841 | 05/03/2021, Source at 52cm from detector face, 0cm poly, 1" lead.
start time: 15:30:15, end time: 15:33:44, duration: 209 s, counts=10311 counts/sec: 49.335 |
| 6842 | 05/03/2021, Source at 52cm from detector face, 0cm poly, 0" lead.
start time: 15:35:55, end time: 15:36:28, duration: 33 s, counts=21640 counts/sec: 655.76 |
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