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

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)