镧的同位素

镧（原子量：138.90547(7)）的同位素，其中有1个同位素是稳定的。

**图表**
116La
57
59
50(22) ms
p（~60%）
115Ba
β+（~40%）
116Ba
117La
57
60
116.95007(43)#
23.5(26) ms
β+
117Ba
(3/2+,3/2−)
p
116Ba
117mLa
151(12) keV
10(5) ms
(9/2+)
118La
57
61
117.94673(32)#
200# ms
β+
118Ba
119La
57
62
118.94099(43)#
1# s
β+
119Ba
11/2−#
120La
57
63
119.93807(54)#
2.8(2) s
β+
120Ba
β+, p
119Cs
121La
57
64
120.93301(54)#
5.3(2) s
β+
121Ba
11/2−#
β+, p
120Cs
122La
57
65
121.93071(32)#
8.6(5) s
β+
122Ba
β+, p
121Cs
123La
57
66
122.92624(21)#
17(3) s
β+
123Ba
11/2−#
124La
57
67
123.92457(6)
29.21(17) s
β+
124Ba
(7−,8−)
124mLa
100(100)# keV
21(4) s
low(+#)
125La
57
68
124.920816(28)
64.8(12) s
β+
125Ba
(11/2−)
125mLa
107.0(10) keV
390(40) ms
(3/2+)
126La
57
69
125.91951(10)
54(2) s
β+
126Ba
(5)(+#)
126mLa
210(410) keV
20(20) s
(0−,1−,2−)
127La
57
70
126.916375(28)
5.1(1) min
β+
127Ba
(11/2−)
127mLa
14.8(12) keV
3.7(4) min
β+
127Ba
(3/2+)
IT
127La
128La
57
71
127.91559(6)
5.18(14) min
β+
128Ba
(5+)
128mLa
100(100)# keV
128La
(1+,2−)
129La
57
72
128.912693(22)
11.6(2) min
β+
129Ba
3/2+
129mLa
172.1(4) keV
560(50) ms
IT
129La
11/2−
130La
57
73
129.912369(28)
8.7(1) min
β+
130Ba
3(+)
131La
57
74
130.91007(3)
59(2) min
β+
131Ba
3/2+
131mLa
304.52(24) keV
170(10) µs
11/2−
132La
57
75
131.91010(4)
4.8(2) h
β+
132Ba
2−
132mLa
188.18(11) keV
24.3(5) min
IT (76%)
132La
6−
β+ (24%)
132Ba
133La
57
76
132.90822(3)
3.912(8) h
β+
133Ba
5/2+
134La
57
77
133.908514(21)
6.45(16) min
β+
134Ba
1+
135La
57
78
134.906977(11)
19.5(2) h
β+
135Ba
5/2+
136La
57
79
135.90764(6)
9.87(3) min
β+
136Ba
1+
136mLa
255(9) keV
114(3) ms
IT
136La
(8)(−#)
137La
57
80
136.906494(14)
6(2)×104 a
EC
137Ba
7/2+
138La
57
81
137.907112(4)
1.02(1)×1011 a
β+ (66.4%)
138Ba
5+
9.0(1)×10−4
β- (33.6%)
138Ce
138mLa
72.57(3) keV
116(5) ns
(3)+
139La
57
82
138.9063533(26)
Stable
7/2+
0.99910(1)
140La
57
83
139.9094776(26)
1.6781(3) d
β-
140Ce
3−
141La
57
84
140.910962(5)
3.92(3) h
β-
141Ce
(7/2+)
142La
57
85
141.914079(6)
91.1(5) min
β-
142Ce
2−
143La
57
86
142.916063(17)
14.2(1) min
β-
143Ce
(7/2)+
144La
57
87
143.91960(5)
40.8(4) s
β-
144Ce
(3−)
145La
57
88
144.92165(10)
24.8(20) s
β-
145Ce
(5/2+)
146La
57
89
145.92579(8)
6.27(10) s
β- (99.99%)
146Ce
2−
β-, n (.007%)
145Ce
146mLa
130(130) keV
10.0(1) s
β-
146Ce
(6−)
147La
57
90
146.92824(5)
4.015(8) s
β- (99.96%)
147Ce
(5/2+)
β-, n (.04%)
146Ce
148La
57
91
147.93223(6)
1.26(8) s
β- (99.85%)
148Ce
(2−)
β-, n (.15%)
147Ce
149La
57
92
148.93473(34)#
1.05(3) s
β- (98.6%)
149Ce
5/2+#
β-, n (1.4%)
148Ce
150La
57
93
149.93877(43)#
510(30) ms
β- (97.3%)
150Ce
(3+)
β-, n (2.7%)
149Ce
151La
57
94
150.94172(43)#
300# ms >300 ns
β-
151Ce
5/2+#
152La
57
95
151.94625(43)#
200# ms >300 ns
β-
152Ce
153La
57
96
152.94962(64)#
150# ms >300 ns
β-
153Ce
5/2+#
154La
57
97
153.95450(64)#
100# ms
β-
154Ce
155La
57
98
154.95835(86)#
60# ms
β-
155Ce
5/2+#

**参考文献**
 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.