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: 234Th: 63.29 and 92.59 keV
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: 277.371, 583.19, 860.557 and 2614.53 keV,
228Ac: 209.253, 338.320, 463,004, 911.21, 964.766 and 968.971 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 from the background table.
If a measurement is below the background then the upper bound shown is the 90% confidence limit.
RAMPS Measurements:




























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






















RAMPS CW01
0.715 g 27.058 250620
250708
25070802		 Jun 20, 2025 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Silicon Carbide Crystal




(mBq/kg) <71.40

<361.50

<15.08

19.59 +- 54.72 2382.50 +- 2104.00 <618.70

<114.80








(ppb or ppm) <5.78 ppb

<29.28 ppb

<26.54 ppb

4.82 ppb +- 13.46 ppb 76.95 ppm +- 67.96 ppm












Results: 210Pb:
7Be:

54Mn:

228Ac:


















(mBq/kg) <3593.00

164.34 +- 350.50 <86.80

45.60 +- 92.95















(ppb or ppm) <291.03 ppb







11.22 ppb +- 22.87 ppb









RAMPS CW02




Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments






(mBq/kg)



























(ppb or ppm)



























Results: 210Pb:
7Be:

54Mn:

228Ac:


















(mBq/kg)



























(ppb or ppm)





















In Progress and To Be Measured:




























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






















Next Sample




Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments






(mBq/kg)



























(ppb or ppm)




























Results: 210Pb:
7Be:

54Mn:

228Ac:

57Co

58Co












(mBq/kg)



























(ppb or ppm)