Some Useful Information Concerning the results:
The Conversion factors for the primordial nuclides are given by: 1 Bq 238U/kg = 81 ppb U (81 x 10-9 gU/g) The 238U decay chain gammas used are: 226Ra: 186.1 keV
214Pb: 295.21 and 351.92 keV
214Bi: 609.31, 1120.29, 1764.49 and 2204.21 keV
The relationships are valid for any daughters in the 238U, 235U or 232Th chain only if the chain is in equilibrium. 1 Bq 232Th/kg = 246 ppb Th (246 x 10-9 gTh/g) The 232Th decay chain gammas used are: 212Pb: 238.63 and 300.09 keV
208Tl: 583.19 and 2614.53 keV,
228Ac: 911.21 keV
1 Bq 40K/kg = 32300 ppb K (32300 x 10-6 gK/g) The 40K decay chain gamma used is: 40K: 1460.83 keV
1 Bq 235U/kg = 1.76 ppm U (1.76 x 10-6 gU/g) The 235U decay chain gammas used are: 235U: 143.76, 163.33 and 205.31 keV
The measurements of the samples below take into account the background measurements. If a measurement is below the background then the upper bound shown is the 90% confidence limit.
QBITS-CUTE Measurements:




























Sample Description Manufacturer Mass (g) Live Time (days) Run Numbers Counting Dates
(if applicable)






















QBITS-CUTE G01
9.0 g 9.382 220726
220729		 Jul 26, 2022 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Nb Superconducting Coax Cable with Crimp Connectors



Aug 5, 2022 (mBq/kg) 1200.00 +- 73.79 <1721.00

<34.58

290.70 +- 49.08 357.64 +- 244.10 <23.75

<22.68








(ppb or ppm) 97.2 ppb +- 5.98 ppb <139.4 ppb

<60.86 ppb

71.51 ppb +- 12.07 ppb 11.55 ppm +- 7.88 ppm














Results: 210Pb:
7Be:

54Mn

228Ac:
















(mBq/kg) <26610.00

<272.20

<13.16

24.47 +- 66.91

















(ppb or ppm) <0.22 ppm







6.02 ppb +- 16.46 ppb











QBITS-CUTE G02
39.9 g 12.833 220805 Aug 5, 2022 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Stainless Steel Cables with Connectors



Aug 18, 2022 (mBq/kg) <10.91

163.50 +- 217.80 <7.35

103.20 +- 13.78 112.29 +- 67.69 <12.82

2.04 +- 2.83






(ppb or ppm) <0.88 ppb

13.24 ppb +- 17.64 ppb <12.94 ppb

25.39 ppb +- 3.39 ppb 3.63 ppm +- 2.19 ppm














Results: 210Pb:
7Be:

54Mn

228Ac:
57Co
58Co:












(mBq/kg) <1896.00

<58.01

<3.67

<37.24

<15.19

<6.43













(ppb or ppm) <153.58 ppb







<9.16 ppb













In Progress and To Be Measured:




























Sample Description Manufacturer Mass (g) Live Time (days) Run Numbers Counting Dates
(if applicable)




























Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Next Sample




(mBq/kg)



























(ppb or ppm)







.




















Results: 210Pb:
7Be:

54Mn:

228Ac:
210Po:














(mBq)





























(ppb or ppm)