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

Background runs for the Lively Detector

If a measurement in the signal region is below the sideband regions then the 90% confidence limit is calculated.

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

Background 1

171.327

Mar 29, 2019

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Jan 20, 2020

(mBq)

1.201

0.053

2.58

0.40

0.110

0.015

1.074

0.058

4.97

0.45

0.024

0.021

0.118

0.018

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

289.25

31.53

<0.26

0.024

0.021

1.305

0.099

<2629.00

Background 2

55.461

200324
200430

Mar 24, 2020

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

May 19, 2020

(mBq)

1.243

0.083

3.02

0.86

0.161

0.029

1.38

0.10

8.35

0.94

<0.043

0.111

0.031

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

554.52

80.36

0.74

0.30

0.020

0.035

2.22

0.18

<4463.00

Combined Background

Combined Backgrounds of runs CW1

171.327

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

(mBq)

1.201

0.053

2.58

0.40

0.110

0.015

1.074

0.058

4.97

0.45

0.024

0.021

0.118

0.018

Completely Empty Detector

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

289.25

31.53

<0.26

0.024

0.021

1.305

0.099

<2629.00

Completed Sample Measurements for the Lively Detector

CUTE Measurements:

Sample Description

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

CUTE L01

CUTE detector holder

133.3 g

6.798

210120

Jan 20, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Copper Holder

Jan 27, 2021

(mBq/kg)

<0.46

21.68

34.83

<0.61

<1.90

<13.39

0.79

0.81

0.78

0.64

(ppm / ppb / ppt)

<0.04 ppb

1.76 ppb

2.82 ppb

<1.07 ppb

<0.47 ppb

<432.5 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

57Co:

58Co:

(mBq/kg)

6785.80

5746.00

<6.15

0.80

0.73

1.09

2.70

<1.09

<0.92

(ppm / ppb / ppt)

549.65 ppb

465.43 ppb

0.27 ppb

0.66 ppb

CUTE L02

The Brass housing has 4 Short Coax Cables and

95.0 g

6.756

210903

Sep 3, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Brass Housing

4 Si nanowire detectors are inside the brass housing

Sep 10, 2021

(mBq/kg)

<2.73

419.20

123.20

5.37

1.67

6.84

3.46

34.99

24.01

<0.81

5.67

1.55

(ppm / ppb / ppt)

<0.22 ppb

33.96 ppb

9.98 ppb

9.45 ppb

2.94 ppb

1.68 ppb

0.85 ppb

1130.11 ppb

775.52 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<33260.00

<13.40

2.42

1.21

9.98

4.81

(ppm / ppb / ppt)

<2.69 ppm

2.46 ppb

1.18 ppb

CUTE L03

Sample of water from the compressed air lines

114.1 g

8.610

211013

Oct 13, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Water

Sample taken from tool bins located in the CUTE clean room

Oct 22, 2021

(mBq/kg)

<1.90

<40.16

1.16

0.69

10.02

2.64

135.97

28.77

<0.66

0.94

0.84

(ppm / ppb / ppt)

<0.15 ppb

<3.25 ppb

2.04 ppb

1.21 ppb

2.46 ppb

0.65 ppb

4391.83 ppb

929.27 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

459.77

960.00

<11.73

1.58

0.93

5.88

3.86

(ppm / ppb / ppt)

37.24 ppb

77.76 ppb

1.45 ppb

0.95 ppb

CUTE L04

OSA #905 – NoCount Wash with UPW

948.9

13.818

220311

Mar 11, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ultra Pure Water

Beaker was washed with NoCount and filled with UPW

Mar 25, 2022

(mBq/kg)

<0.24

8.66

6.69

<0.25

<0.53

5.92

2.65

<0.22

<0.060

(ppm / ppb / ppt)

<19.44 ppt

0.7 ppb

0.54 ppb

<0.44 ppb

<130.38 ppt

191.12 ppb

85.63 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<382.80

<1.42

<0.22

<0.95

(ppm / ppb / ppt)

<31.01 ppb

<233.7 ppt

CUTE L05

OSA #905 – Radiac washed U/S cleaned and added UPW

918.5 g

9.638

220325

Mar 25, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ultra Pure Water

Apr 4, 2022

(mBq/kg)

<0.30

8.83

7.59

<0.29

<0.56

2.24

2.85

<0.096

<0.17

(ppm / ppb / ppt)

<24.3 ppt

0.72 ppb

0.61 ppb

<0.51 ppb

<137.76 ppt

72.33 ppb

92.18 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<604.90

<1.65

<0.12

0.81

0.61

(ppm / ppb / ppt)

<49 ppb

0.2 ppb

0.15 ppb

CUTE L06

245.2 g

6.303

220916
220919
22091901
220920

Sep 16, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

133Ba SRS-22-001-B Rinse Solution

Sep 23, 2022

(mBq/kg)

<0.99

<40.92

<1.06

<3.84

<18.06

<0.40

<0.35

(ppm / ppb / ppt)

<80.19 ppt

<3.31 ppb

<1.87 ppb

<0.94 ppb

<0.58 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

133Ba:

(mBq/kg)

3790.50

992.50

4.54

5.78

<0.35

<4.26

124.47

8.56

(ppm / ppb / ppt)

307.03 ppb

80.39 ppb

<1.05 ppb

CUTE L07

Rinse Test #2

262.2 g

9.798

221021
221024
221025
22102701

Oct 21, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

133Ba SRS-22-001-B Rinse Solution

Oct 31, 2022

(mBq/kg)

<0.82

<21.57

0.47

0.39

<1.66

8.96

8.91

<1.12

<0.76

(ppm / ppb / ppt)

<0.07 ppb

<1.75 ppb

0.82 ppb

0.69 ppb

<0.41 ppb

289.49 ppb

287.89 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

133Ba:

(mBq/kg)

<688.90

<7.13

<0.51

3.68

2.12

<0.53

(ppm / ppb / ppt)

<55.8 ppb

0.91 ppb

0.52 ppb

CUTE L08

Rinse Test #2

250.4 g

9.020

221031

Oct 31, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

133Ba SRS-22-001-D Rinse Solution

Nov 9, 2022

(mBq/kg)

<0.76

<24.27

<0.79

<1.78

4.26

9.73

<0.79

<0.93

(ppm / ppb / ppt)

<0.06 ppb

<1.97 ppb

<1.39 ppb

<0.44 ppb

137.58 ppb

314.28 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

133Ba:

(mBq/kg)

<947.20

<10.20

<0.53

<4.22

<0.72

(ppm / ppb / ppt)

<76.72 ppb

<1.04 ppb

CUTE L09

M3, M4, M8 brass screws and nuts (15 pieces)

52.225 g

8.340

230109
231017

Jan 9, 2023

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Brass Screws

Jan 18, 2023

(mBq/kg)

<2.01

<118.00

<2.30

<4.61

<56.76

<1.21

4.21

1.63

(ppm / ppb / ppt)

<0.16 ppb

<9.56 ppb

<4.05 ppb

<1.13 ppb

<1.83 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

57Co:

58Co:

(mBq/kg)

16918.00

14830.00

<9.80

2.21

1.41

8.82

5.42

<4.50

0.87

1.64

(ppm / ppb / ppt)

1.37 ppm

1.2 ppm

2.17 ppb

1.33 ppb

In Progress Sample Measurements for the Lively Detector

Runs in Progress:

Sample Description

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)

(ppm / ppb / ppt)

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

(ppm / ppb / ppt)