鈰的同位素

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。

**圖表**
119Ce
58
61
118.95276(64)#
200# ms
β+
119La
5/2+#
120Ce
58
62
119.94664(75)#
250# ms
β+
120La
0+
121Ce
58
63
120.94342(54)#
1.1(1) s
β+
121La
(5/2)(+#)
122Ce
58
64
121.93791(43)#
2# s
β+
122La
0+
β+, p
121Ba
123Ce
58
65
122.93540(32)#
3.8(2) s
β+
123La
(5/2)(+#)
β+, p
122Ba
124Ce
58
66
123.93041(32)#
9.1(12) s
β+
124La
0+
125Ce
58
67
124.92844(21)#
9.3(3) s
β+
125La
(7/2-)
β+, p
124Ba
126Ce
58
68
125.92397(3)
51.0(3) s
β+
126La
0+
127Ce
58
69
126.92273(6)
29(2) s
β+
127La
5/2+#
128Ce
58
70
127.91891(3)
3.93(2) min
β+
128La
0+
129Ce
58
71
128.91810(3)
3.5(3) min
β+
129La
(5/2+)
130Ce
58
72
129.91474(3)
22.9(5) min
β+
130La
0+
130mCe
2453.6(3) keV
100(8) ns
(7-)
131Ce
58
73
130.91442(4)
10.2(3) min
β+
131La
(7/2+)
131mCe
61.8(1) keV
5.0(10) min
β+
131La
(1/2+)
132Ce
58
74
131.911460(22)
3.51(11) h
β+
132La
0+
132mCe
2340.8(5) keV
9.4(3) ms
IT
132Ce
(8-)
133Ce
58
75
132.911515(18)
97(4) min
β+
133La
1/2+
133mCe
37.1(8) keV
4.9(4) h
β+
133La
9/2-
134Ce
58
76
133.908925(22)
3.16(4) d
EC
134La
0+
135Ce
58
77
134.909151(12)
17.7(3) h
β+
135La
1/2(+)
135mCe
445.8(2) keV
20(1) s
IT
135Ce
(11/2-)
136Ce
58
78
135.907172(14)
觀測上穩定
0+
0.00185(2)
0.00185-0.00186
136mCe
3095.5(4) keV
2.2(2) µs
10+
137Ce
58
79
136.907806(14)
9.0(3) h
β+
137La
3/2+


137mCe
254.29(5) keV
34.4(3) h
IT (99.22%)
137Ce
11/2-
β+ (.779%)
137La
138Ce
58
80
137.905991(11)
觀測上穩定
0+
0.00251(2)
0.00251-0.00254
138mCe
2129.17(12) keV
8.65(20) ms
IT
138Ce
7-
139Ce
58
81
138.906653(8)
137.641(20) d
EC
139La
3/2+
139mCe
754.24(8) keV
56.54(13) s
IT
139Ce
11/2-
140Ce
58
82
139.9054387(26)
Stable
0+
0.88450(51)
0.88446-0.88449
140mCe
2107.85(3) keV
7.3(15) µs
6+
141Ce
58
83
140.9082763(26)
32.508(13) d
β-
141Pr
7/2-
142Ce
58
84
141.909244(3)
觀測上穩定
0+
0.11114(51)
0.11114-0.11114
143Ce
58
85
142.912386(3)
33.039(6) h
β-
143Pr
3/2-
144Ce
58
86
143.913647(4)
284.91(5) d
β-
144mPr
0+
145Ce
58
87
144.91723(4)
3.01(6) min
β-
145Pr
(3/2-)
146Ce
58
88
145.91876(7)
13.52(13) min
β-
146Pr
0+
147Ce
58
89
146.92267(3)
56.4(10) s
β-
147Pr
(5/2-)
148Ce
58
90
147.92443(3)
56(1) s
β-
148Pr
0+
149Ce
58
91
148.9284(1)
5.3(2) s
β-
149Pr
(3/2-)#
150Ce
58
92
149.93041(5)
4.0(6) s
β-
150Pr
0+
151Ce
58
93
150.93398(11)
1.02(6) s
β-
151Pr
3/2-#
152Ce
58
94
151.93654(21)#
1.4(2) s
β-
152Pr
0+
153Ce
58
95
152.94058(43)#
500# ms >300 ns
β-
153Pr
3/2-#
154Ce
58
96
153.94342(54)#
300# ms >300 ns
β-
154Pr
0+
155Ce
58
97
154.94804(64)#
200# ms >300 ns
β-
155Pr
5/2-#
156Ce
58
98
155.95126(64)#
150# ms
β-
156Pr
0+
157Ce
58
99
156.95634(75)#
50# ms
β-
157Pr
7/2+#

**參考文獻**
 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) date=20110324090740 . Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and  Atomic Weights Revised (2005) date=20080305062433 .- 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 date=20110716114059 , Nuc. Phys. A 729, pp. 3-128 (2003).
** National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the  NuDat 2.1 database date=20190513230730  (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.