Activity Listing for EXO Samples, activated at MIT 3/25-26/2003



Zelimir Djurcic and Andreas Piepke
University of Alabama
(Status 3/27/2003)


We summarize the activities found in the activated samples UA 105, 106, 107, 108, and 109, (UA sample designation NA 13). The activities listed refer to 3/27/2003 11:00 (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 Duration 24Na 42K 46Sc 59Fe 60Co 64Cu 82Br 110mAg 122Sb 124Sb 140La 198Au
UA 105
Old British lead 		6 h (5.8±0.6)·107
UA 106 and UA 107
US Cominco and Swedish Boliden lead 		6 h (1.2±0.2)·104 300±50 ND ND ND (3.6±0.4)·104 ND 2840±290 544±55 ND ND 1480±150
UA 108
Avalanche Photo Diode 		2 h (7.8±0.8)·106
UA 109
p-terphenyl powder 		12 h (6.7±0.7)·104 1750±210 43±21 75±52 68±20 ND 3270±330 ND 2100±210 ND 984±100 (2.4±0.4)·104
Sample Duration 24Na 42K 46Sc 59Fe 60Co 64Cu 82Br 110mAg 122Sb 124Sb 140La 198Au


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