鈰(原子量:140.116(1))的同位素,其中有1個同位素是穩定的,另外有3個目前歸類為穩定的同位素,理論上都會進行雙β衰變(衰變為鋇或釹),但是半衰期都只有下界。
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More information 符號, Z ...
符號
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Z
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N
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同位素質量(u) [n 1][n 2]
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半衰期 [n 1][n 2]
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衰變 方式[2]
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衰變 產物 [n 3]
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原子核 自旋[n 1]
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相對豐度 (莫耳分率)[n 2]
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相對豐度 的變化量 (莫耳分率)
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激發能量[n 2]
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119Ce
|
58
|
61
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118.95276(64)#
|
200# ms
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β+
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119La
|
5/2+#
|
|
|
120Ce
|
58
|
62
|
119.94664(75)#
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250# ms
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β+
|
120La
|
0+
|
|
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121Ce
|
58
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63
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120.94342(54)#
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1.1(1) s
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β+
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121La
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(5/2)(+#)
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|
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122Ce
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58
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64
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121.93791(43)#
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2# s
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β+
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122La
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0+
|
|
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β+, p
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121Ba
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123Ce
|
58
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65
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122.93540(32)#
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3.8(2) s
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β+
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123La
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(5/2)(+#)
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|
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β+, p
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122Ba
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124Ce
|
58
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66
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123.93041(32)#
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9.1(12) s
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β+
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124La
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0+
|
|
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125Ce
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58
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67
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124.92844(21)#
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9.3(3) s
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β+
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125La
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(7/2-)
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|
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β+, p
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124Ba
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126Ce
|
58
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68
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125.92397(3)
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51.0(3) s
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β+
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126La
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0+
|
|
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127Ce
|
58
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69
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126.92273(6)
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29(2) s
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β+
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127La
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5/2+#
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|
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128Ce
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58
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70
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127.91891(3)
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3.93(2) min
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β+
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128La
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0+
|
|
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129Ce
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58
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71
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128.91810(3)
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3.5(3) min
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β+
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129La
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(5/2+)
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|
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130Ce
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58
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72
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129.91474(3)
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22.9(5) min
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β+
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130La
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0+
|
|
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130mCe
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2453.6(3) keV
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100(8) ns
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|
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(7-)
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|
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131Ce
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58
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73
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130.91442(4)
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10.2(3) min
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β+
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131La
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(7/2+)
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|
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131mCe
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61.8(1) keV
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5.0(10) min
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β+
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131La
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(1/2+)
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|
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132Ce
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58
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74
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131.911460(22)
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3.51(11) h
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β+
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132La
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0+
|
|
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132mCe
|
2340.8(5) keV
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9.4(3) ms
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IT
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132Ce
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(8-)
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|
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133Ce
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58
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75
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132.911515(18)
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97(4) min
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β+
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133La
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1/2+
|
|
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133mCe
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37.1(8) keV
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4.9(4) h
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β+
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133La
|
9/2-
|
|
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134Ce
|
58
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76
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133.908925(22)
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3.16(4) d
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ε
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134La
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0+
|
|
|
135Ce
|
58
|
77
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134.909151(12)
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17.7(3) h
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β+
|
135La
|
1/2(+)
|
|
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135mCe
|
445.8(2) keV
|
20(1) s
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IT
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135Ce
|
(11/2-)
|
|
|
136Ce
|
58
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78
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135.907172(14)
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觀測上穩定[n 4]
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0+
|
0.00185(2)
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0.00185-0.00186
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136mCe
|
3095.5(4) keV
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2.2(2) µs
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|
|
10+
|
|
|
137Ce
|
58
|
79
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136.907806(14)
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9.0(3) h
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β+
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137La
|
3/2+
|
|
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137mCe
|
254.29(5) keV
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34.4(3) h
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IT (99.22%)
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137Ce
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11/2-
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|
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β+ (.779%)
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137La
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138Ce
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58
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80
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137.905991(11)
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觀測上穩定[n 5]
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0+
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0.00251(2)
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0.00251-0.00254
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138mCe
|
2129.17(12) keV
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8.65(20) ms
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IT
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138Ce
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7-
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|
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139Ce
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58
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81
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138.906653(8)
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137.641(20) d
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ε
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139La
|
3/2+
|
|
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139mCe
|
754.24(8) keV
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56.54(13) s
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IT
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139Ce
|
11/2-
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|
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140Ce[n 6]
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58
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82
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139.9054387(26)
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穩定
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0+
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0.88450(51)
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0.88446-0.88449
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140mCe
|
2107.85(3) keV
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7.3(15) µs
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|
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6+
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|
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141Ce[n 6]
|
58
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83
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140.9082763(26)
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32.508(13) d
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β−
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141Pr
|
7/2-
|
|
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142Ce[n 6]
|
58
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84
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141.909244(3)
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觀測上穩定[n 7]
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0+
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0.11114(51)
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0.11114-0.11114
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143Ce[n 6]
|
58
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85
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142.912386(3)
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33.039(6) h
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β−
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143Pr
|
3/2-
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|
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144Ce[n 6]
|
58
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86
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143.913647(4)
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284.91(5) d
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β−
|
144mPr
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0+
|
|
|
145Ce
|
58
|
87
|
144.91723(4)
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3.01(6) min
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β−
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145Pr
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(3/2-)
|
|
|
146Ce
|
58
|
88
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145.91876(7)
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13.52(13) min
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β−
|
146Pr
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0+
|
|
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147Ce
|
58
|
89
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146.92267(3)
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56.4(10) s
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β−
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147Pr
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(5/2-)
|
|
|
148Ce
|
58
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90
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147.92443(3)
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56(1) s
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β−
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148Pr
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0+
|
|
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149Ce
|
58
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91
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148.9284(1)
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5.3(2) s
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β−
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149Pr
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(3/2-)#
|
|
|
150Ce
|
58
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92
|
149.93041(5)
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4.0(6) s
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β−
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150Pr
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0+
|
|
|
151Ce
|
58
|
93
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150.93398(11)
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1.02(6) s
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β−
|
151Pr
|
3/2-#
|
|
|
152Ce
|
58
|
94
|
151.93654(21)#
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1.4(2) s
|
β−
|
152Pr
|
0+
|
|
|
153Ce
|
58
|
95
|
152.94058(43)#
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500# ms [>300 ns]
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β−
|
153Pr
|
3/2-#
|
|
|
154Ce
|
58
|
96
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153.94342(54)#
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300# ms [>300 ns]
|
β−
|
154Pr
|
0+
|
|
|
155Ce
|
58
|
97
|
154.94804(64)#
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200# ms [>300 ns]
|
β−
|
155Pr
|
5/2-#
|
|
|
156Ce
|
58
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98
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155.95126(64)#
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150# ms
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β−
|
156Pr
|
0+
|
|
|
157Ce
|
58
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99
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156.95634(75)#
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50# ms
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β−
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157Pr
|
7/2+#
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Close
畫上#號的數據代表沒有經過實驗的証明,僅為理論推測。
理論上會通過β+β+衰變成138Ba,半衰期超過150×1012年
理論上會通過β−β−衰變成142Nd,半衰期超過50×1015年
- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report) (頁面存檔備份,存於網際網路檔案館). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005) (頁面存檔備份,存於網際網路檔案館).
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties (頁面存檔備份,存於網際網路檔案館), Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (頁面存檔備份,存於網際網路檔案館) (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.