Un article de Wikipedia, l'enciclopedia liura.
L’
europi
a 38
isotops
coneguts que son
nombre de massa
varia de 130 a 167 e 17
isomers nuclears
.
Symbole
de l'isotope
|
Z (
p
)
|
N (
n
)
|
Massa isotopica (u)
|
Periode radioactiu
|
Mode(s) de
desintegracion
[1]
|
Isotop(s) fius
|
Espin
nuclear
|
| Energia d'excitacion
|
| 130
Eu
|
63
|
67
|
129,96357(54)
|
1,1(5) ms
[0,9(+5-3) ms]
|
|
|
2+
|
| 131
Eu
|
63
|
68
|
130,95775(43)
|
17,8(19) ms
|
|
|
3/2+
|
| 132
Eu
|
63
|
69
|
131,95437(43)
|
100 ms
|
β
+
|
132
Sm
|
|
| p
|
131
Sm
|
| 133
Eu
|
63
|
70
|
132,94924(32)
|
200 ms
|
β
+
|
133
Sm
|
11/2-
|
| 134
Eu
|
63
|
71
|
133,94651(21)
|
0,5(2) s
|
β
+
|
134
Sm
|
|
| β
+
, p (rare)
|
133
Pm
|
| 135
Eu
|
63
|
72
|
134,94182(32)
|
1,5(2) s
|
β
+
|
135
Sm
|
11/2-
|
| β
+
, p
|
134
Pm
|
| 136
Eu
|
63
|
73
|
135,93960(21)
|
3,3(3) s
|
β
+
(99,91 %)
|
136
Sm
|
(7+)
|
| β
+
, p (0,09 %)
|
135
Pm
|
| 136m
Eu
|
0,(500) keV
|
3,8(3) s
|
β
+
(99,91 %)
|
136
Sm
|
(3+)
|
| β
+
, p (0,09 %)
|
135
Pm
|
| 137
Eu
|
63
|
74
|
136,93557(21)
|
8,4(5) s
|
β
+
|
137
Sm
|
11/2-
|
| 138
Eu
|
63
|
75
|
137,93371(3)
|
12,1(6) s
|
β
+
|
138
Sm
|
(6-)
|
| 139
Eu
|
63
|
76
|
138,929792(14)
|
17,9(6) s
|
β
+
|
139
Sm
|
(11/2)-
|
| 140
Eu
|
63
|
77
|
139,92809(6)
|
1,51(2) s
|
β
+
|
140
Sm
|
1+
|
| 140m
Eu
|
210(15) keV
|
125(2) ms
|
TI (99 %)
|
140
Eu
|
5-
|
| β
+
(1 %)
|
140
Sm
|
| 141
Eu
|
63
|
78
|
140,924931(14)
|
40,7(7) s
|
β
+
|
141
Sm
|
5/2+
|
| 141m
Eu
|
96,45(7) keV
|
2,7(3) s
|
TI (86 %)
|
141
Eu
|
11/2-
|
| β
+
(14 %)
|
141
Sm
|
| 142
Eu
|
63
|
79
|
141,92343(3)
|
2,36(10) s
|
β
+
|
142
Sm
|
1+
|
| 142m
Eu
|
460(30) keV
|
1,223(8) min
|
β
+
|
142
Sm
|
8-
|
| 143
Eu
|
63
|
80
|
142,920298(12)
|
2,59(2) min
|
β
+
|
143
Sm
|
5/2+
|
| 143m
Eu
|
389,51(4) keV
|
50,0(5) μs
|
|
|
11/2-
|
| 144
Eu
|
63
|
81
|
143,918817(12)
|
10,2(1) s
|
β
+
|
144
Sm
|
1+
|
| 144m
Eu
|
1127,6(6) keV
|
1,0(1) μs
|
|
|
(8-)
|
| 145
Eu
|
63
|
82
|
144,916265(4)
|
5,93(4) j
|
β
+
|
145
Sm
|
5/2+
|
| 145m
Eu
|
716,0(3) keV
|
490 ns
|
|
|
11/2-
|
| 146
Eu
|
63
|
83
|
145,917206(7)
|
4,61(3) j
|
β
+
|
146
Sm
|
4-
|
| 146m
Eu
|
666,37(16) keV
|
235(3) μs
|
|
|
9+
|
| 147
Eu
|
63
|
84
|
146,916746(3)
|
24,1(6) j
|
β
+
(99,99 %)
|
147
Sm
|
5/2+
|
| α (0,0022 %)
|
143
Pm
|
| 148
Eu
|
63
|
85
|
147,918086(11)
|
54,5(5) j
|
β
+
(100 %)
|
148
Sm
|
5-
|
| α (9,39×10
?7
%)
|
144
Pm
|
| 149
Eu
|
63
|
86
|
148,917931(5)
|
93,1(4) j
|
CE
|
149
Sm
|
5/2+
|
| 150
Eu
|
63
|
87
|
149,919702(7)
|
36,9(9) a
|
β
+
|
150
Sm
|
5(-)
|
| 150m
Eu
|
42,1(5) keV
|
12,8(1) h
|
β
?
(89 %)
|
150
Gd
|
0-
|
| β
+
(11 %)
|
150
Sm
|
| TI (5×10
?8
%)
|
150
Eu
|
| 151
Eu
|
63
|
88
|
150,9198502(26)
|
4,62×10
18
a
|
α
|
147
Pm
|
5/2+
|
| 151m
Eu
|
196,245(10) keV
|
58,9(5) μs
|
|
|
11/2-
|
| 152
Eu
|
63
|
89
|
151,9217445(26)
|
13,537(6) a
|
CE (72,09 %), β
+
(0,027 %)
|
152
Sm
|
3-
|
| β
-
(27,9 %)
|
152
Gd
|
| 152m1
Eu
|
45,5998(4) keV
|
9,3116(13) h
|
β
?
(72 %)
|
152
Gd
|
0-
|
| β
+
(28 %)
|
152
Sm
|
| 152m2
Eu
|
65,2969(4) keV
|
0,94(8) μs
|
|
|
1-
|
| 152m3
Eu
|
78,2331(4) keV
|
165(10) ns
|
|
|
1+
|
| 152m4
Eu
|
89,8496(4) keV
|
384(10) ns
|
|
|
4+
|
| 152m5
Eu
|
147,86(10) keV
|
96(1) min
|
|
|
8-
|
| 153
Eu
|
63
|
90
|
152,9212303(26)
|
Observat estable
|
5/2+
|
| 154
Eu
|
63
|
91
|
153,9229792(26)
|
8,593(4) a
|
β
?
(99,98 %)
|
154
Gd
|
3-
|
| CE (0,02 %)
|
154
Sm
|
| 154m1
Eu
|
145,3(3) keV
|
46,3(4) min
|
TI
|
154
Eu
|
(8-)
|
| 154m2
Eu
|
68,1702(4) keV
|
2,2(1) μs
|
|
|
2+
|
| 155
Eu
|
63
|
92
|
154,9228933(27)
|
4,7611(13) a
|
β
?
|
155
Gd
|
5/2+
|
| 156
Eu
|
63
|
93
|
155,924752(6)
|
15,19(8) j
|
β
?
|
156
Gd
|
0+
|
| 157
Eu
|
63
|
94
|
156,925424(6)
|
15,18(3) h
|
β
?
|
157
Gd
|
5/2+
|
| 158
Eu
|
63
|
95
|
157,92785(8)
|
45,9(2) min
|
β
?
|
158
Gd
|
(1-)
|
| 159
Eu
|
63
|
96
|
158,929089(8)
|
18,1(1) min
|
β
?
|
159
Gd
|
5/2+
|
| 160
Eu
|
63
|
97
|
159,93197(22)
|
38(4) s
|
β
?
|
160
Gd
|
1(-)
|
| 161
Eu
|
63
|
98
|
160,93368(32)
|
26(3) s
|
β
?
|
161
Gd
|
5/2+
|
| 162
Eu
|
63
|
99
|
161,93704(32)
|
10,6(10) s
|
β
?
|
162
Gd
|
|
| 163
Eu
|
63
|
100
|
162,93921(54)
|
6 s
|
β
?
|
163
Gd
|
5/2+
|
| 164
Eu
|
63
|
101
|
163,94299(64)
|
2 s
|
β
?
|
164
Gd
|
|
| 165
Eu
|
63
|
102
|
164,94572(75)
|
1 s
|
β
?
|
165
Gd
|
5/2+
|
| 166
Eu
|
63
|
103
|
165,94997(86)
|
400 ms
|
β
?
|
166
Gd
|
|
| 167
Eu
|
63
|
104
|
166,95321(86)
|
200 ms
|
β
?
|
167
Gd
|
5/2+
|
- ↑
Abreviacions : CE :
capture electronique
; TI :
transicion isomerica
.
