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
Completed Sample Measurements Counted on the Vue des Alpes Detector
The measurements of the samples below take into account the background measurement shown above. 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 V01 Thorlabs Inc. 155.9 g 23.516 240827 Aug 27, 2024 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Thorlabs PDA045 SiPM Detector Window Material: Borosilicate Glass


Sep 20, 2024 (mBq/kg) 1600.00 +- 36.71 22440.00 +- 1020.00 410.30 +- 10.00 3366.00 +- 85.54 2576.20 +- 157.40
N/A
3.67 +- 3.28

Detector Window Faces the HPGe Detector



(ppb or ppm) 129.6 ppb +- 2.97 ppb 1817.64 ppb +- 82.62 ppb 722.13 ppb +- 17.6 ppb 828.04 ppb +- 21.04 ppb 83.21 ppm +- 5.08 ppm Peak interference from 232Th progeny











Results: 210Pb:
7Be:

54Mn:

228Ac:


















(mBq/kg) 43311.00 +- 9088.00 <56.44

34.52 +- 5.29 1947.00 +- 59.15
















(ppb or ppm) 3.51 ppm +- 0.74 ppm





478.96 ppb +- 14.55 ppb















Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments






(mBq/kg)



























(ppm / ppb / ppt)





























Results: 210Pb:
7Be:

54Mn

228Ac:
















(mBq/kg)





























(ppm / ppb / ppt)























In Progress Sample Measurements Counted on the Vue des Alpes Detector
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:


















(mBq/kg)




























(ppb or ppm)