Plütonyum (Pu) kararlı izotoplara sahip değildir. Standart bir atom kütlesi belirlenemez.
Tablo
nüklid
sembolü
|
Z(p)
|
N(n)
|
izotop ağırlığı (u)
|
yarılanma ömrü
|
nükleer
döngü
|
| uyarılma enerjisi
|
| 228Pu
|
94
|
134
|
228.03874(3)
|
1.1(+20-5) s
|
0+
|
| 229Pu
|
94
|
135
|
229.04015(6)
|
120(50) s
|
3/2+#
|
| 230Pu
|
94
|
136
|
230.039650(16)
|
1.70(17) min
|
0+
|
| 231Pu
|
94
|
137
|
231.041101(28)
|
8.6(5) min
|
3/2+#
|
| 232Pu
|
94
|
138
|
232.041187(19)
|
33.7(5) min
|
0+
|
| 233Pu
|
94
|
139
|
233.04300(5)
|
20.9(4) min
|
5/2+#
|
| 234Pu
|
94
|
140
|
234.043317(7)
|
8.8(1) h
|
0+
|
| 235Pu
|
94
|
141
|
235.045286(22)
|
25.3(5) min
|
(5/2+)
|
| 236Pu
|
94
|
142
|
236.0460580(24)
|
2.858(8) a
|
0+
|
| 237Pu
|
94
|
143
|
237.0484097(24)
|
45.2(1) d
|
7/2-
|
| 237m1Pu
|
145.544(10) keV
|
180(20) ms
|
1/2+
|
| 237m2Pu
|
2900(250) keV
|
1.1(1) µs
|
|
| 238Pu
|
94
|
144
|
238.0495599(20)
|
87.7(1) a
|
0+
|
| 239Pu
|
94
|
145
|
239.0521634(20)
|
24.11(3)E+3 a
|
1/2+
|
| 239m1Pu
|
391.584(3) keV
|
193(4) ns
|
7/2-
|
| 239m2Pu
|
3100(200) keV
|
7.5(10) µs
|
(5/2+)
|
| 240Pu
|
94
|
146
|
240.0538135(20)
|
6561(7) a
|
0+
|
| 241Pu
|
94
|
147
|
241.0568515(20)
|
14.290(6) a
|
5/2+
|
| 241m1Pu
|
161.6(1) keV
|
0.88(5) µs
|
1/2+
|
| 241m2Pu
|
2200(200) keV
|
21(3) µs
|
|
| 242Pu
|
94
|
148
|
242.0587426(20)
|
3.75(2)E+5 a
|
0+
|
| 243Pu
|
94
|
149
|
243.062003(3)
|
4.956(3) h
|
7/2+
|
| 243mPu
|
383.6(4) keV
|
330(30) ns
|
(1/2+)
|
| 244Pu
|
94
|
150
|
244.064204(5)
|
8.00(9)E+7 a
|
0+
|
| 245Pu
|
94
|
151
|
245.067747(15)
|
10.5(1) h
|
(9/2-)
|
| 246Pu
|
94
|
152
|
246.070205(16)
|
10.84(2) d
|
0+
|
| 247Pu
|
94
|
153
|
247.07407(32)#
|
2.27(23) d
|
1/2+#
|
