NaI JD-766 Attenuation

Preliminary Measurements

Detector JD-766 on experimental table to measure background count rate to be used in attenuation measurements.

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