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

Background 3

N/A

66.148

210517
210524

May 17, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Jun 23, 2021

(mBq)

0.38

0.05

2.58

0.73

0.110

0.024

0.91

0.08

5.09

0.64

<0.051

0.041

0.021

210709

Jul 2, 2021

Jul 15, 2021

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

210729
21080501
210812
21081201

Jul 29, 2021

(mBq)

315.91

64.66

0.22

0.23

<0.061

1.50

0.14

<3713.00

Aug 23, 2021

Background 6

N/A

28.561

230916
23091701
230927
230929
23092901
230930
23093001
231001
231003
23100401
231008
231012
231014

Sep 16, 2023

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Oct 18, 2023

(mBq)

0.40

0.07

1.67

1.10

0.140

0.037

0.88

0.12

3.86

0.84

<0.059

0.141

0.040

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

126.75

91.84

<0.33

<0.059

1.81

0.22

<3542.00

Background 7

N/A

49.532

240603
240707
240710

June, 3, 2024

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Completely Empty Detector

Jul 23, 2024

(mBq)

0.14

0.05

1.60

0.81

0.105

0.028

0.79

0.09

5.34

0.75

<0.036

0.067

0.025

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

11.58

69.03

0.31

0.27

0.033

0.031

1.43

0.16

0.00

2720.00

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

[cnts/(d-kg)]

0.275

0.012

0.591

0.093

0.025

0.003

0.246

0.013

1.139

0.104

0.0054

0.0049

0.027

0.004

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)

289.25

31.53

<0.26

0.024

0.021

1.305

0.099

<2629.00

[cnts/(d-kg)]

66.334

7.231

<0.06

0.0054

0.0048

0.299

0.023

<602.91

Background 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)

Results:

210Pb:

7Be:

54Mn

228Ac:

210Po:

(mBq)