Activity Listing for KamLAND Samples, activated at MIT 6/5/2002



Zelimir Djurcic and Andreas Piepke
University of Alabama
(Status 7/21/2002)


We summarize the activities found in the activated samples UA 78 to 84 (UA sample designation NA 10). The activities listed refer to 6/7/2002 12:30 (initial counting after receipt of the samples while still in their activation vials). 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 65Zn 82Br 122Sb 131Ba 140La 181Hf 187W 198Au 233Pa 239Np
UA 78
Carcoal grains PE vial 		12 h (19±1.9)·104 794±82 1790±180 519±52 299±32 909±91 ND 59±7 ND 149±17 233±24 93±10 ND ND
UA 79
Si screw in PE vial 		12 h (15.0±1.5)·104 485±58 ND 286±29 27±19 1020±103 65±9 ND 98±11 ND 52±13 482±49 ND ND
UA 80
Empty quartz vial 		12 h 2660±266 295±34 95±19 1180±120 43±10 29±4 40±5 ND 998±100 ND 243±26 2920±293 ND ND
UA 81
Liquid scint in quartz vial 		12 h (3.5±0.35)·104 1340±147 91±47 2250±230 108±33 2350±236 823±83 ND 2260±230 ND 5220±523 921±93 ND ND
UA 82
Liquid scint in quartz vial 		12 h (1.8±0.2)·104 1230±134 483±67 1620±163 58±29 2050±206 1300±131 ND 1120±113 ND 425±47 491±50 ND ND
UA 83
Scint. residue, K/U spiked 		12 h (10.4±1.1)·104 740±119 360±81 1118±120 72±29 ND 3200±322 534±56 921±93 ND 134±35 114±15 ND < 77.4
UA 84
Scint. residue, Th spiked 		12 h (13.2±1.3)·104 663±170 ND 970±101 ND 9070±910 280±39 ND 81±24 ND 79±54 65±17 < 63 ND
Sample Rabbit 24Na 42K 51Cr 60Co 65Zn 82Br 122Sb 131Ba 140La 181Hf 187W 198Au 233Pa 239Np


This page is maintained by A. Piepke
Last update September 16, 2002