Geoscience Reference
In-Depth Information
10
6
), cross-sections
Table 12.1
Element abundances (normalized to Si
=
millibarn or 10
−31
m
2
), and isotopic abundances (in percent) of the nuclides in the
Ce-Gd range.
σ
(in mb
=
Isotopic
Isotopic
Abund.
σ
(mb)
abund.
Abund.
σ
(mb)
abund.
Ce
1.14
Sm
0.258
140
Ce
144
Sm
11
88.48
92
3.1
141
Ce
147
Sm
76
973
17.5
142
Ce
148
Sm
28
11.08
241
11.3
149
Sm
Pr
0.167
1820
13.8
141
Pr
150
Sm
111.4
100
422
7.4
142
Pr
151
Sm
415
2710
143
Pr
152
Sm
350
473
26.7
153
Sm
Nd
0.828
1095
142
Nd
154
Sm
35
27.13
206
22.7
143
Nd
245
12.18
Eu
0.0973
144
Nd
151
Eu
81.3
23.8
3775
47.8
145
Nd
152
Eu
425
8.3
7600
146
Nd
153
Eu
91.2
17.19
2780
52.2
147
Nd
154
Eu
544
4420
148
Nd
155
Eu
147
5.76
1320
150
Nd
159
5.64
Gd
0.33
152
Gd
Pm
1049
0.2
147
Pm
153
Gd
1290
4550
148
Pm
154
Gd
2970
1028
21.8
149
Pm
2510
Gd150
1.79E+6 y
Gd151
124 d
Gd152
Gd153
241.6 d
Gd154
Gd155
Gd156
Gd157
Gd158
α
EC,
α
0.20
EC
2.18
14.80
20.47
15.65
24.84
Eu144
10.2 s
Eu145
5.93 d
Eu146
4.59 d
Eu147
24.1 d
Eu148
54.5 d
Eu149
93.1 d
Eu150
35.8 y
Eu151
Eu152
13.542 y
Eu153
Eu154
8.593 y
Eu155
4.7611 y
Eu156
15.19 d
Eu157
15.18 h
EC
EC
EC
EC,
α
EC,
α
EC
EC
EC,
β
EC,
β
β
β
β
47.8
-
52.2
-
-
-
-
Sm143
8.83 m
Sm144
Sm145
340 d
Sm146
1.03E+8 y
Sm147
1.06E+11 y
Sm148
Sm149
Sm150
Sm151
90 y
Sm152
Sm153
46.27 h
Sm154
Sm155
22.3 m
Sm156
9.4 h
EC
EC
α
β
β
β
β
3.1
15.0
11.3
13.8
7.4
-
26.7
-
22.7
-
-
Pm142
40.5 s
Pm143
265 d
Pm144
363 d
Pm145
17.7 y
Pm146
5.53 y
Pm147
2.6234 y
Pm148
5.370 d
Pm149
53.08 h
Pm150
2.68 h
Pm151
28.40 h
Pm152
4.1 m
Pm153
5.4 m
Pm154
1.73 m
Pm155
41.5 s
EC
EC
EC
EC,
α
EC,
β
β
β
β
β
β
β
β
β
β
-
-
-
-
-
-
-
-
-
-
Nd141
2.49 h
Nd142
Nd143
Nd144
2.29E+15 y
Nd145
Nd146
Nd147
10.98 d
Nd148
Nd149
1.728 h
Nd150
1E18 y
Nd151
12.44 m
Nd152
11.4 m
Nd153
28.9 s
Nd154
25.9 s
EC
β
-
β
-
β
-
β
-
β
-
β
-
27.13
12.18
23.80
8.30
17.19
5.76
5.64
Pr140
3.39 m
Pr141
Pr142
19.12 h
Pr143
13.57 d
Pr144
17.28 m
Pr145
5.984 h
Pr146
24.15 m
Pr147
13.4 m
Pr148
2.27 m
Pr149
2.26 m
Pr150
6.19 s
Pr151
18.90 s
EC
100
EC,
β
-
β
-
β
-
β
-
β
-
β
-
β
-
β
-
β
-
β
-
Ce139
137.640 d
Ce140
Ce141
32.501 d
Ce142
Ce143
33.039 h
Ce144
284.893 d
Ce145
3.01 m
Ce146
13.52 m
Ce147
56.4 s
Ce148
56 s
Ce149
5.3 s
Ce150
4.0 s
EC
88.48
β
-
11.08
β
-
β
-
β
-
β
-
β
-
β
-
β
-
β
-
Figure 12.21
The chart of the nuclides in the Ce-Gd range. The solid squares represent stable nuclides or
nuclides with a long half-life. EC stands for electron capture.
