UnderGraduate Neutron Correlations Lab

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NaI detector setup

Creating ROOT data files

source ~/CODA/setup

/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 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. start time: 13:10:43, end time: 13:17:55, duration: 432 s, counts=10164
6830	05/03/2021, Source at 52cm from detector face, 40cm poly. start time: 13:20:11, end time: 13:27:21, duration: 430 s, counts=10459
6831	05/03/2021, Source at 52cm from detector face, 35cm poly. start time: 14:08:49, end time: 14:16:17, duration: 448 s, counts=11007
6832	05/03/2021, Source at 52cm from detector face, 30cm poly. start time: 14:17:28, end time: 14:24:21, duration: 413 s, counts=10128
6833	05/03/2021, Source at 52cm from detector face, 25cm poly. start time: 14:25:48, end time: 14:32:37, duration: 409 s, counts=10112
6834	05/03/2021, Source at 52cm from detector face, 20cm poly. start time: 14:34:10, end time: 14:41:01, duration: 411 s, counts=10210
6835	05/03/2021, Source at 52cm from detector face, 15cm poly. start time: 14:42:11, end time: 14:48:59, duration: 408 s, counts=10181
6836	05/03/2021, Source at 52cm from detector face, 10cm poly. start time: 14:49:59, end time: 14:56:45 , duration: 406 s, counts=10344
6837	05/03/2021, Source at 52cm from detector face, 5cm poly. start time: 14:57:52, end time: 15:04:39 , duration: 407 s, counts=10890
6838	05/03/2021, Source at 52cm from detector face, 0cm poly. start time: 15:05:46, end time: , duration: s, counts=

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