Table A-2. MAJOR GAMMA-RAY ENERGIES AND INTENSITIES

Energy (keV)

Nuclide

Half-life

γ/d %

Associated Major Gamma-ray and Intensity

keV

%

keV

%

keV

%

49.72

Te132

3.26 h

13.1

228.2

88.2

49.7

13.1

57.36

Ce143

1.38 d

11.8

293.3

42.0

664.6

5.2

722.0

5.1

66.91

Cs136

13.16 d

12.5

818.5

99.7

1048.1

79.6

340.6

48.5

72.06

W-187

23.90 h

11.9

685.8

26.4

479.5

21.1

134.2

9.5

77.60

Ba142

10.70 m

9.6

255.2

18.0

1204.1

14.0

894.9

11.0

80.10

Ce144

284.60 d

1.6

133.5

11.1

80.1

1.6

80.18

I-131

8.04 d

2.6

364.5

81.2

637.0

7.3

284.3

6.1

81.00

Xe133

5.24 d

38.3

81.0

38.3

86.29

Cs136

13.16 d

6.3

818.5

99.7

1048.1

79.6

340.6

48.5

91.11

Nd147

10.98 d

27.9

91.1

27.9

531.0

13.1

319.4

2.0

93.00

Rb-91

58.50 s

38.0

93.0

38.0

2564.0

20.0

346.0

12.0

99.55

Np239

2.36 d

14.7

103.8

23.7

277.6

14.1

106.1

22.7

102.1

Te131 m

1.35 d

7.9

773.7

38.2

852.2

20.7

793.7

13.9

103.8

Np239

2.36 d

23.7

103.8

23.7

277.6

14.1

106.1

22.7

106.1

Np239

2.36 d

22.7

103.8

23.7

277.6

14.1

106.1

22.7

112.0

O-19

26.90 s

2.7

197.0

97.0

1356.0

59.0

112.0

2.7

117.0

Np239

2.36 d

22.7

103.8

23.7

277.6

14.1

106.1

22.7

120.9

Kr-90

32.30 s

2.7

1118.7

37.0

121.8

32.0

539.5

29.0

121.8

Kr-90

32.30 s

32.0

1118.7

37.0

121.8

32.0

539.5

29.0

122.1

Co-57

271.80 d

85.9

122.1

85.9

136.5

10.6

127.2

Tc101

14.20 m

2.8

306.8

88.0

545.1

6.0

127.4

2.8

133.0

Hf181

42.40 d

41.7

482.0

82.8

133.0

41.7

345.9

17.2

133.5

Ce144

284.60 d

11.1

133.5

11.1

80.1

1.6

134.2

W-187

23.90 h

9.5

685.8

26.4

479.5

21.1

134.2

9.5

135.4

I-134

52.60 m

3.8

847.0

95.4

884.1

65.3

1072.6

15.3

136.3

Hf181

42.40 d

5.2

482.0

92.8

133.0

41.7

345.9

17.2

136.5

Co-57

271.80 d

10.6

122.1

85.9

136.5

10.6

138.1

Cs138

32.20 m

1.5

1435.9

76.3

462.8

30.7

1009.8

29.8

140.5

No-99

2.79 d

3.8

739.6

12.8

181.1

6.2

778.0

4.5

140.5

Tc-99 m

6.01 h

89.1

140.5

99.1

142.7

Fe-59

44.63 d

1.0

1099.2

56.5

1291.6

43.2

192.3

3.1

145.4

Ce141

32.50 d

48.2

145.4

48.2

151.2

Kr-85 m

4.48 h

75.1

151.2

75.1

304.9

13.7

153.2

Cs136

13.16 d

7.5

818.5

99.7

1048.1

79.8

340.6

48.5

153.8

Xe138

14.10 m

6.0

258.3

31.5

434.5

20.3

1768.3

16.7

162.6

Ba140

12.75 d

6.7

537.3

24.4

162.6

6.7

304.8

4.5

164.0

Cs136

13.16 d

4.6

818.5

99.7

1048.1

79.8

340.6

48.5

165.9

Ba139

83.76 m

22.0

165.9

22.0

166.0

Kr-88

2.84 h

3.1

196.3

26.0

834.8

13.0

1529.8

10.9

168.7

Sr-93

7.40 m

18.2

590.3

67.2

875.7

24.2

888.1

21.9

175.0

Xe139

39.70 s

16.0

219.0

45.0

297.0

18.0

175.0

16.0

176.3

Sb125

2.76 y

6.9

427.9

29.4

600.6

17.8

635.9

11.3

176.6

CS136

13.16 d

13.6

818.5

99.7

1048.1

79.8

340.6

48.5

181.1

Mo-99

2.79 d

6.2

739.6

12.1

181.1

6.2

778.0

4.5

194.1

Tc101

14.20 m

1.6

306.9

88.0

545.1

6.0

127.4

2.8

190.2

Ba141

18.30 m

49.0

190.2

49.0

304.2

26.6

277.0

24.6

192.3

Fe-59

44.51 d

3.1

1099.2

56.5

1291.6

43.2

192.3

3.1



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