Isotopes of Cesium (Z=55)
Click on an isotope to get more information about its decay
|
Isotope
|
Half-life
|
Spin
Parity
|
Decay Mode(s) or
Abundance |
|---|
| 112Cs
| 500 us |
|
%P=?
|
|---|
| 113Cs
| 17 us | (5/2+)
|
%P ~ 100, %EC+%B+ ~ 0.03
|
|---|
| 114Cs
| 0.57 s | (1+)
|
%EC+%B+ ~ 100, %A=0.018 6, %ECP=7 2, %ECA=0.16 6
|
|---|
| 115Cs
| 1.4 s |
|
%EC+%B+=100, %ECP ~ 0.07
|
|---|
| 116Cs
| 3.84 s | >4+
|
%EC+%B+=100, %ECP=0.44 14, %ECA=0.08 2
|
|---|
| 116m1Cs
| 0.70 s | (1+)
|
%EC+%B+=100, %ECP=0.28 7, %ECA=0.049 25
|
|---|
| 117Cs
| 8.4 s | (9/2+)
|
%EC+%B+=100
|
|---|
| 117m1Cs
| 6.5 s | (3/2+)
|
%EC+%B+=100
|
|---|
| 118Cs
| 14 s | 2
|
%EC+%B+=100, %ECP<4.2E-2 6, %ECA<2.4E-3 4
|
|---|
| 118m1Cs
| 17 s | (7-)
|
%EC+%B+=100, %ECP<4.2E-2 6, %ECA<2.4E-3 4
|
|---|
| 119Cs
| 43.0 s | 9/2+
|
%EC+%B+=100
|
|---|
| 119m1Cs
| 30.4 s | 3/2(+)
|
%EC+%B+=100
|
|---|
| 120Cs
| 64 s | 2
|
%EC+%B+=100
|
|---|
| 120m1Cs
| 57 s |
|
%EC+%B+=100, %ECP=7E-6 3, %ECA=2.0E-5 4
|
|---|
| 121Cs
| 155 s | 3/2(+)
|
%EC+%B+=100
|
|---|
| 121m1Cs
| 122 s | 9/2(+)
|
%EC+%B+=83, %IT=17
|
|---|
| 122Cs
| 21.0 s | 1+
|
%EC+%B+=100
|
|---|
| 122m1Cs
| 3.70 m | 8-
|
%EC+%B+=100
|
|---|
| 122m2Cs
| 0.36 s | (5)-
|
%IT=100
|
|---|
| 123Cs
| 5.94 m | 1/2+
|
%EC+%B+=100
|
|---|
| 123m1Cs
| 1.64 s | (11/2)-
|
%IT=100
|
|---|
| 124Cs
| 30.8 s | 1+
|
%EC+%B+=100
|
|---|
| 124m1Cs
| 6.3 s | (7)+
|
%IT=100
|
|---|
| 125Cs
| 45 m | (1/2+)
|
%EC+%B+=100
|
|---|
| 126Cs
| 1.64 m | 1+
|
%EC+%B+=100
|
|---|
| 127Cs
| 6.25 h | 1/2+
|
%EC+%B+=100
|
|---|
| 128Cs
| 3.66 m | 1+
|
%EC+%B+=100
|
|---|
| 129Cs
| 32.06 h | 1/2+
|
%EC+%B+=100
|
|---|
| 130Cs
| 29.21 m | 1+
|
%EC+%B+=98.4, %B-=1.6
|
|---|
| 130m1Cs
| 3.46 m | 5-
|
%IT=99.84 2, %EC+%B+=0.16 2
|
|---|
| 131Cs
| 9.689 d | 5/2+
|
%EC=100
|
|---|
| 132Cs
| 6.479 d | 2+
|
%EC+%B+=98.13 9, %B-=1.87 9
|
|---|
| 133Cs
| stable | 7/2+
|
%Abundance=100
|
|---|
| 134Cs
| 2.0648 y | 4+
|
%B-=99.9997 1, %EC=0.0003 1
|
|---|
| 134m1Cs
| 2.903 h | 8-
|
%IT=100
|
|---|
| 135Cs
| 2.3e+6 y | 7/2+
|
%B-=100
|
|---|
| 135m1Cs
| 53 m | 19/2-
|
%IT=100
|
|---|
| 136Cs
| 13.16 d | 5+
|
%B-=100
|
|---|
| 136m1Cs
| 19 s | 8-
|
%IT=?, %B-=?
|
|---|
| 137Cs
| 30.07 y | 7/2+
|
%B-=100
|
|---|
| 138Cs
| 33.41 m | 3-
|
%B-=100
|
|---|
| 138m1Cs
| 2.91 m | 6-
|
%B-=19 2, %IT=81 2
|
|---|
| 139Cs
| 9.27 m | 7/2+
|
%B-=100
|
|---|
| 140Cs
| 63.7 s | 1-
|
%B-=100
|
|---|
| 141Cs
| 24.94 s | 7/2+
|
%B-=100, %B-N=0.029 2
|
|---|
| 142Cs
| 1.70 s | 0-
|
%B-=100, %B-N=0.091 3
|
|---|
| 143Cs
| 1.78 s | 3/2+
|
%B-=100, %B-N=1.62 10
|
|---|
| 144Cs
| 1.01 s | 1
|
%B-=100, %B-N=3.17 19
|
|---|
| 144m1Cs
| 1 s | (GE 4)
|
%B-=?
|
|---|
| 145Cs
| 0.594 s | 3/2+
|
%B-=100, %B-N=13.8 8
|
|---|
| 146Cs
| 0.321 s | 1-
|
%B-=100 , %B-N=14.2 5
|
|---|
| 147Cs
| 0.225 s | (3/2+)
|
%B-=100, %B-N=43 5
|
|---|
| 148Cs
| 158 ms |
|
%B-=100, %B-N=25 3
|
|---|
| 149Cs
| |
|
|
|---|
| 150Cs
| |
|
|
|---|
| 151Cs
| |
|
|
|---|
Isotope Explorer Nuclear Structure and Decay Data
8th Edition of the Table of Isotopes
Isotopes Project Home Page
Lawrence Berkeley National Laboratory