To facilitate public analysis of the Neptunium 239 detection in the 9/14/11 Saint Louis fallout event, the raw data from the Neptunium 239 detection analysis is presented below.
Further analysis spawned by public input indicates that the measured spike at approximately 92 hours into the testing is NOT from Radon 222 daughter in-growth. Moreover, the presence of on going detectable levels of Radon 222 (+ daughters) in the sample is
ruled out by the lack of an activity spike in the unshielded sample taken at 9/15/2011 17:06:50.
Data measured with a Medcom Radalert Inspector
Conversion factor 1mR/hr = 3500 CPM, based on Cs 137
Measurement
Start Time | Measurement | Units | Source | Alpha Radiation Blocked |
9/14/2011 17:48:30 | 0.94 | mR/hr | Test Sample | yes |
9/14/2011 17:50:10 | 0.893 | mR/hr | Test Sample | yes |
9/14/2011 17:52:00 | 0.83 | mR/hr | Test Sample | yes |
9/14/2011 17:55:00 | 0.796 | mR/hr | Test Sample | yes |
9/14/2011 18:08:00 | 0.628 | mR/hr | Test Sample | yes |
9/14/2011 18:22:00 | 0.45 | mR/hr | Test Sample | yes |
9/14/2011 18:38:30 | 0.349 | mR/hr | Test Sample | yes |
9/14/2011 18:51:05 | 0.238 | mR/hr | Test Sample | yes |
9/14/2011 18:52:30 | 0.222 | mR/hr | Test Sample | yes |
9/14/2011 19:09:00 | 0.192 | mR/hr | Test Sample | yes |
9/14/2011 19:10:00 | 0.163 | mR/hr | Test Sample | yes |
9/14/2011 19:14:53 | 0.142 | mR/hr | Test Sample | yes |
9/14/2011 19:22:10 | 0.116 | mR/hr | Test Sample | yes |
9/14/2011 19:29:00 | 0.116 | mR/hr | Test Sample | yes |
9/14/2011 20:05:15 | 0.069 | mR/hr | Test Sample | yes |
9/14/2011 20:12:00 | 0.057 | mR/hr | Test Sample | yes |
9/14/2011 20:28:30 | 0.048 | mR/hr | Test Sample | yes |
9/14/2011 22:22:14 | 0.03 | mR/hr | Test Sample | yes |
9/14/2011 23:23:00 | 0.027 | mR/hr | Test Sample | yes |
9/14/2011 23:33:00 | 0.014 | mR/hr | Test Sample | yes |
9/15/2011 13:11:30 | 475 | ten minute count | Test Sample | yes |
9/15/2011 13:55:30 | 478 | ten minute count | Test Sample | yes |
9/15/2011 14:19:24 | 2768 | one hour Count | Test Sample | yes |
9/15/2011 15:29:10 | 2006 | one hour Count | Background | n/a |
9/15/2011 17:06:50 | 2676 | one hour Count | Unshielded Test Sample | NO |
9/15/2011 18:28:00 | 2055 | one hour Count | Background | n/a |
9/15/2011 19:42:00 | 2489 | one hour Count | Test Sample | yes |
9/15/2011 21:47:05 | 2457 | one hour Count | Test Sample | yes |
9/16/2011 12:01:00 | 2358 | one hour Count | Test Sample | yes |
9/16/2011 13:26:00 | 2005 | one hour Count | Background | n/a |
9/16/2011 19:25:00 | 2349 | one hour Count | Test Sample | yes |
9/16/2011 20:45:00 | 2070 | one hour Count | Background | n/a |
9/17/2011 11:12:02 | 2410 | one hour Count | Test Sample | yes |
9/17/2011 12:17:00 | 2097 | one hour Count | Background | n/a |
9/17/2011 13:26:00 | 2369 | one hour Count | Test Sample | yes |
9/17/2011 20:05:00 | 2180 | one hour Count | Test Sample | yes |
9/17/2011 21:21:00 | 2106 | one hour Count | Background | n/a |
9/18/2011 12:01:00 | 2647 | one hour Count | Test Sample | yes |
9/18/2011 13:06:00 | 2041 | one hour Count | Background | n/a |
9/18/2011 14:10:00 | 2552 | one hour Count | Test Sample | yes |
9/18/2011 15:15:00 | 1989 | one hour Count | Background | n/a |
9/18/2011 17:50:00 | 2966 | one hour Count | Test Sample | yes |
9/18/2011 19:04:00 | 2032 | one hour Count | Background | n/a |
9/19/2011 8:45:00 | 2351 | one hour Count | Test Sample | yes |
9/19/2011 9:59:00 | 2121 | one hour Count | Background | n/a |
| | | | |
Begin CSV data format:
Measurement Start Time,Measurement,Units,Source,Alpha Radiation Blocked
9/14/2011 17:48:30,0.94,mR/hr,Test Sample,yes
9/14/2011 17:50:10,0.893,mR/hr,Test Sample,yes
9/14/2011 17:52:00,0.83,mR/hr,Test Sample,yes
9/14/2011 17:55:00,0.796,mR/hr,Test Sample,yes
9/14/2011 18:08:00,0.628,mR/hr,Test Sample,yes
9/14/2011 18:22:00,0.45,mR/hr,Test Sample,yes
9/14/2011 18:38:30,0.349,mR/hr,Test Sample,yes
9/14/2011 18:51:05,0.238,mR/hr,Test Sample,yes
9/14/2011 18:52:30,0.222,mR/hr,Test Sample,yes
9/14/2011 19:09:00,0.192,mR/hr,Test Sample,yes
9/14/2011 19:10:00,0.163,mR/hr,Test Sample,yes
9/14/2011 19:14:53,0.142,mR/hr,Test Sample,yes
9/14/2011 19:22:10,0.116,mR/hr,Test Sample,yes
9/14/2011 19:29:00,0.116,mR/hr,Test Sample,yes
9/14/2011 20:05:15,0.069,mR/hr,Test Sample,yes
9/14/2011 20:12:00,0.057,mR/hr,Test Sample,yes
9/14/2011 20:28:30,0.048,mR/hr,Test Sample,yes
9/14/2011 22:22:14,0.03,mR/hr,Test Sample,yes
9/14/2011 23:23:00,0.027,mR/hr,Test Sample,yes
9/14/2011 23:33:00,0.014,mR/hr,Test Sample,yes
9/15/2011 13:11:30,475,ten minute count,Test Sample,yes
9/15/2011 13:55:30,478,ten minute count,Test Sample,yes
9/15/2011 14:19:24,2768,one hour Count,Test Sample,yes
9/15/2011 15:29:10,2006,one hour Count,Background,n/a
9/15/2011 17:06:50,2676,one hour Count,Unshielded Test Sample,NO
9/15/2011 18:28:00,2055,one hour Count,Background,n/a
9/15/2011 19:42:00,2489,one hour Count,Test Sample,yes
9/15/2011 21:47:05,2457,one hour Count,Test Sample,yes
9/16/2011 12:01:00,2358,one hour Count,Test Sample,yes
9/16/2011 13:26:00,2005,one hour Count,Background,n/a
9/16/2011 19:25:00,2349,one hour Count,Test Sample,yes
9/16/2011 20:45:00,2070,one hour Count,Background,n/a
9/17/2011 11:12:02,2410,one hour Count,Test Sample,yes
9/17/2011 12:17:00,2097,one hour Count,Background,n/a
9/17/2011 13:26:00,2369,one hour Count,Test Sample,yes
9/17/2011 20:05:00,2180,one hour Count,Test Sample,yes
9/17/2011 21:21:00,2106,one hour Count,Background,n/a
9/18/2011 12:01:00,2647,one hour Count,Test Sample,yes
9/18/2011 13:06:00,2041,one hour Count,Background,n/a
9/18/2011 14:10:00,2552,one hour Count,Test Sample,yes
9/18/2011 15:15:00,1989,one hour Count,Background,n/a
9/18/2011 17:50:00,2966,one hour Count,Test Sample,yes
9/18/2011 19:04:00,2032,one hour Count,Background,n/a
9/19/2011 8:45:00,2351,one hour Count,Test Sample,yes
9/19/2011 9:59:00,2121,one hour Count,Background,n/a