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

The measurements of the samples below take into account the background measurements. If a measurement is below the background then the upper bound shown is the 90% confidence limit.

DM-ICE Measurements:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

DM-ICE 1

Quantum Silicones

600 g

4.005

Jul 5, 2010

(mBq/kg)

2.08

1.10

38.50

61.00

0.96

1.30

<0.12 ppb

39.50

18.60

1.83

1.37

0.32

0.42

Q Gel 900

Richmond, Va, USA

Jul 9, 2010

(ppb or ppm)

0.17 ppb

0.09 ppb

3.12 ppb

4.94 ppb

1.69 ppb

2.30 ppb

<0.03 ppb

2.05 ppm

0.60 ppm

DM-ICE 2

Sample from near ICE Cube String 8

1000.2 g

7.003

Aug 17, 2010

(mBq/kg)

0.94

0.57 ppb

30.49

28.59

0.18

0.69

0.93

0.58

<8.10

<0.09

<0.19

South Pole Deep Ice

Aug 24, 2010

(ppb or ppm)

0.076 ppb

0.046 ppb

2.47 ppb

2.32 ppb

0.31 ppb

1.21 ppb

0.47 ppb

0.14 ppb

<261.70 ppb

DM-ICE 3

Sample from near ICE Cube String 41

999.5 g

7.909

Aug 24, 2010

(mBq/kg)

0.21

0.54

<10.99

0.07

0.59

<0.48

<5.81

<0.09

<0.07

South Pole Deep Ice

Sep 1, 2010

(ppb or ppm)

0.017 ppb

0.043 ppb

<0.89 ppb

0.13 ppb

1.04 ppb

<0.118 ppb

<187.78 ppb

DM-ICE 4

34 Blank Filters (Unused)

25.45 g

1.867

Dec 18, 2013

(mBq/kg)

20.35

35.47

<599.89

7.19

38.51

493.89

73.03

451.87

396.86

43.220

35.360

<3.92

Whatman Filter Papers

Whatman 41 Ashless 110 mm dia cat# 1441-110

Dec 20, 2013

(ppb or ppm)

1.65 ppb

2.87 ppb

<48.59 ppb

12.66 ppb

67.78 ppb

121.50 ppb

17.96 ppb

14.60 ppm

12.82 ppm

DM-ICE 5

5 Filters Used For Water From String 8

3.8 g

4.954

Nov 3, 2010

(mBq/kg)

<141.80

<278.77

108.64

135.04

<560.19

26.32

166.44

<17.46

Whatman Filter Papers

Whatman 41 Ashless 110 mm dia cat# 1441-110

Nov 8, 2010

(ppb or ppm)

<11.49 ppb

<490.63 ppb

26.73 ppb

33.22 ppb

<18.09 ppm

DM-ICE 9

Sandvik SANMAC SAF 2205 hollow bar duplex steel

2149.5 g

6.833

Nov 22, 2010

(mBq/kg)

2.28

0.72

118.31

60.11

8.79

1.68

6.49

0.96

13.77

6.38

0.65

0.61

7.19

0.82

54Mn Signal:

Steel

Nov 29, 2010

(ppb or ppm)

0.19 ppb

0.06 ppb

9.58 ppb

4.87 ppb

15.48 ppb

2.96 ppb

1.60 ppb

0.24 ppb

444.79 ppb

206.04 ppb

3.16 mBq/kg

0.70 mBq/kg

DM-ICE 10

“Virgin Grade” PTFE

1492.5 g

12.908

Jan 11, 2011

(mBq/kg)

<0.41

24.46

21.37

1.92

0.72

0.52

0.44

0.34

5.09

<0.13

<0.089

7Be Signal:

Teflon

Applied Plastics and Technology

Jan 24, 2011

(ppb or ppm)

<0.033 ppb

1.98 ppb

1.73 ppb

3.38 ppb

1.27 ppb

0.13 ppb

0.11 ppb

10.82 ppb

164.48 ppb

2.61 mBq/kg

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

DM-ICE 11

Southern Brass and Copper

550.0 g

11.468

Mar 9, 2011

(mBq/kg)

0.17

0.92

<0.67

3.56

1.79

<1.22

<5.13

<0.26

<0.12

58Co Signal:

Copper

Mar 22, 2011

(ppb or ppm)

0.013 ppb

0.075 ppb

<0.054 ppb

6.26 ppb

3.16 ppb

<0.30 ppb

<165.61 ppb

1.27 mBq/kg

0.55 mBq/kg

DM-ICE 12

String 80

1001.8 g

6.003

Apr 21, 2011

(mBq/kg)

0.114

0.535

<12.53

0.176

0.688

<0.613

4.89

6.69

0.100

0.599

0.150

0.282

7Be Signal:

South Pole Deep Ice

Sample taken on the way up at 8:00 PM on 12/17/2010 at 1800m

Apr 27, 2011

(ppb or ppm)

0.009 ppb

0.043 ppb

<1.02 ppb

0.310 ppb

1.212 ppb

<0.151 ppb

157.99 ppb

216.02 ppb

7.59 mBq/kg

3.79 mBq/kg

DM-ICE 13

String 79

1000 g

5.915

Apr 27, 2011

(mBq/kg)

<0.607

8.98

20.16

0.112

0.788

<0.676

<6.608

<0.768

0.295

0.312

7Be Signal:

South Pole Deep Ice

Sample taken at 3:15 AM on 12/16/2010 at depth of drill 2450m (plus wt. Stack)

May 3, 2011

(ppb or ppm)

<0.049 ppb

0.728 ppb

1.633 ppb

0.197 ppb

1.386 ppb

<0.166 ppb

<213.45 ppb

2.70 mBq/kg

3.29 mBq/kg

DM-ICE 14

String 79

1000.4 g

5.943

May 6, 2011

(mBq/kg)

0.657

0.608

26.99

27.09

<0.643

<0.360

5.098

7.097

0.300

0.600

<0.312

7Be Signal:

South Pole Deep Ice

Sample taken at 10:50 AM on 12/16/2010, drill on the way up, 200m from the top

May 12, 2011

(ppb or ppm)

0.053 ppb

0.049 ppb

2.186 ppb

2.194 ppb

<1.132 ppb

<0.089 ppb

164.66 ppb

229.24 ppb

6.70 mBq/kg

3.30 mBq/kg

DM-ICE 15

String 7

1001.3 g

4.994

Jun 22, 2011

(mBq/kg)

1.31

0.75

21.37

33.86

<0.785

<0.645

<2.197

<0.369

<0.089

South Pole Deep Ice

Sample on 12/11/2010 at 2260m

Jun 27, 2011

(ppb or ppm)

0.106 ppb

0.061 ppb

1.73 ppb

2.74 ppb

<1.382 ppb

<0.159 ppb

<70.96 ppb

DM-ICE 16

String 7

1001.9 g

5.780

Jun 30, 2011

(mBq/kg)

1.20

0.66

9.18

30.64

<0.456

<0..669

<4.45

<0.668

<0.243

South Pole Deep Ice

No information on bottle

Jul 5, 2011

(ppb or ppm)

0.097 ppb

0.053 ppb

0.74 ppb

2.48 ppb

<0.803 ppb

<0.165 ppb

<143.64 ppb

DM-ICE 17

String 31

1004.3 g

3.921

Jan 16, 2012

(mBq/kg)

0.23

0.71

<3.95

0.02

0.88

0.31

0.66

<10.89

0.60

0.80

<0.28

7Be Signal:

South Pole Deep Ice

Sample taken at 9:41 AM on 12/04/2010, hole #1, sample 1

Jan 20, 2012

(ppb or ppm)

0.019 ppb

0.057 ppb

<0.32 ppb

0.04 ppb

1.55 ppb

0.075 ppb

0.161 ppb

<351.79 ppb

10.85 mBq/kg

4.88 mBq/kg

DM-ICE 18

String 31

999.3 g

6.741

Oct 24, 2011

(mBq/kg)

0.33

0.58

15.91

25.12

0.75

0.78

0.82

0.54

2.30

6.00

0.30

0.60

<0.21

South Pole Deep Ice

Sample taken at 10:00 AM on 12/04/2010, hole #1, sample 2

Oct 31, 2011

(ppb or ppm)

0.026 ppb

0.047 ppb

1.29 ppb

2.04 ppb

1.32 ppb

1.38 ppb

0.20 ppb

0.13 ppb

74.34 ppb

193.94 ppb

DM-ICE 19

String 27? (Hard to read)

1000.4 g

3.945

Jan 23, 2012

(mBq/kg)

0.58

0.77

13.50

30.29

0.16

0.98

0.02

0.74

15.79

10.20

<0.451

0.25

0.38

South Pole Deep Ice

Sample taken at 1:43 PM on 12/07/2010

Jan 27, 2012

(ppb or ppm)

0.047 ppb

0.062 ppb

1.09 ppb

2.45 ppb

0.28 ppb

1.72 ppb

0.004 ppb

0.182 ppb

510.14 ppb

329.33 ppb

DM-ICE 20

String 14

999.8 g

4.404

Jan 27, 2012

(mBq/kg)

<0.197

<6.85

0.88

<1.031

<2.82

<0.47

0.02

0.31

South Pole Deep Ice

Sample taken at 6:40 PM on 12/09/2010 at 2340m (return @ 81 m), hole 3

Feb 1, 2012

(ppb or ppm)

<0.016 ppb

<0.56 ppb

1.55 ppb

<0.254 ppb

<91.104 ppb

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

DM-ICE 21

Cat NO. 40928-6
Batch NO. 178-97,
Purity 99.999%

2060.6 g

8.799

Aug 23, 2011

(mBq/kg)

0.49

0.36

<6.35

0.85

0.62

0.36

0.35

13.64

4.17

<0.370

<0.084

Sodium Iodide

Aldrich – APL

Sep 2, 2011

(ppb or ppm)

0.040 ppb

0.029 ppb

<0.51 ppb

1.49 ppb

1.09 ppb

0.088 ppb

0.087 ppb

440.47 ppb

134.81 ppb

Additional Activities:

(mBq/kg)

7Be:

0.34

+/-

1.50

22Na:

0.68

0.29

24Na:

0.38

0.15

126I:

5.46

0.75

(ppb or ppm)

DM-ICE 22

Cat No. HT-NAI101XG
Batch NO. 173-52C,
Purity 99.999%
Form Powder

2005.7 g

6.908

Aug 2, 2012

(mBq/kg)

0.78

0.48

10.12

16.05

0.37

0.74

<0.39

<3.90

<1.59

<0.23

Sodium Iodide

Sigma-Aldrich Urbana

Aug 9, 2012

(ppb or ppm)

0.063 ppb

0.039 ppb

0.82 ppb

1.30 ppb

0.64 ppb

1.30 ppb

<0.095 ppb

<125.85

Additional Activities:

(mBq/kg)

7Be:

1.85

+/-

2.24

22Na:

0.25

24Na:

1.00

0.29

126I:

7.68

1.01

(ppb or ppm)

In Progress and To Be Measured:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

(mBq/kg)

(ppb or ppm)