Activity Listing for KamLAND PPO Samples, activated at MIT 6/10/2001



Zelimir Djurcic and Andreas Piepke
University of Alabama
(Status 6/19/2001)


We summarize the activities found in the activated samples UA 32, 33, 34, 36, 37, 40, 41 and 42 (UA sample designation NA 6). The activities listed refer to 6/13/2001 (initial counting after receipt of the samples while still in their activation vials), except for UA 37 which was counted 6/14/2001. We only list the principal activities as determined by gamma ray spectroscopy using a shielded Ge detector. The listed activities are given in units of [Bq]. The quoted errors were derived by adding the statistical and a 10% systematic error in quadrature. ND means "not detected" (statistically insignificant).

Activity [Bq]
Sample Rabbit 24Na 42K 51Cr 60Co 82Br 122Sb 131Ba 140La 198Au 233Pa 239Np
UA 32 & 33
Packard PPO 21-635 		C front/middle (7.2±0.7)·103 ND ND ND 270±30 ND ND ND ND ND ND
UA 34
Packard PPO 21-634 		B back (1.2±0.2)·104 ND 107±15 360±36 520±50 190±19 ND ND 69±7 ND ND
UA 36
Packard PPO 21-634 ppt-level U/Th spike 		B back (2.6±0.3)·104 380±142 230±130 ND 1030±100 49±22 ND ND ND 32±36 100±60
UA 37
PPO high level U/Th spike 		C middle (2.1±0.2)·104 170±30 ND ND 3320±33 ND ND 435±44 ND ND 6290±630
UA 40
flux monitor		 B front (7.9±0.8)·104 (1.9±0.2)·104 ND ND 2880±290 ND 8680±870 347±35 ND (2.1±0.2)·104 (5.9±0.6)·104
UA 41
flux monitor		 B middle (6.8±0.8)·104 (1.5±0.2)·104 ND ND 5990±600 ND 8200±820 325±33 ND (1.7±0.2)·104 (4.2±0.4)·104
UA 42
flux monitor		 B middle (8.4±0.8)·104 (2.0±0.2)·104 ND ND 4850±485 ND 10700±107 423±42 ND (2.4±0.24)·104 (7.2±0.7)·104


UA 32 and 33 where counted together. These two containers contained both Packard PPO batch 21-635.

This page is maintained by A. Piepke
Last update July 11, 2001