Difference between revisions of "UnderGraduate Neutron Correlations Lab"

Revision as of 22:24, 26 April 2021

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

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
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
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:

@@ Line 60: / Line 60: @@
 | 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
 |-
-| 6821 ||  start time:  16:11:41  04/26/2021  Cs-137 out, Cd in , Cf-252 in , Poly thermalizer 1/2" in. NaI at closest possible.  stop time:
+| 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
+|-
+| 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:
 |-
 |}