Cerium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
119Ce | 118.95276 (64) |
| 200 | ms | -44,000 (600) | 8,060 (5) | B+ ? |
|
120Ce | 119.94664 (75) |
| 250 | ms | -49,710 (700) | 8,107 (6) | B+ ? |
|
121Ce | 120.94342 (54) |
| 1.1 | s | -52,700 (500) | 8,132 (4) | B+ | 100 |
122Ce | 121.93791 (43) |
| 2 | s | -57,840 (400) | 8,173 (3) | B+ ? |
|
123Ce | 122.93540 (32) |
| 3.8 | s | -60,180 (300) | 8,192 (2) | B+ | 100 |
124Ce | 123.93041 (32) |
| 9.1 | s | -64,820 (300) | 8,228 (2) | B+ | 100 |
125Ce | 124.92844 (21) |
| 9.3 | s | -66,660 (200) | 8,242 (2) | B+ | 100 |
126Ce | 125.923971 (30) |
| 51 | s | -70,821 (28) | 8,273.3 (2.2) | B+ | 100 |
127Ce | 126.922731 (62) |
| 29 | s | -71,976 (58) | 8,280.8 (4.6) | B+ | 100 |
128Ce | 127.918911 (30) |
| 3.93 | m | -75,534 (28) | 8,306.9 (2.2) | B+ | 100 |
129Ce | 128.918102 (30) |
| 3.5 | m | -76,287 (28) | 8,310.9 (2.2) | B+ | 100 |
130Ce | 129.914736 (30) |
| 22.9 | m | -79,423 (28) | 8,333.2 (2.2) | B+ | 100 |
131Ce | 130.914422 (36) |
| 10.2 | m | -79,715 (34) | 8,333.4 (2.6) | B+ | 100 |
132Ce | 131.911460 (22) |
| 3.51 | h | -82,474 (21) | 8,352.4 (1.6) | B+ | 100 |
133Ce | 132.911515 (18) |
| 97 | m | -82,423 (16) | 8,349.9 (1.2) | B+ | 100 |
134Ce | 133.908925 (22) |
| 3.16 | d | -84,836 (20) | 8,365.8 (1.5) | EC | 100 |
135Ce | 134.909151 (12) |
| 17.7 | h | -84,625 (11) | 8,362.05 (8.2) | B+ | 100 |
136Ce | 135.907172 (14) | 0.185 (2) | stable |
| -86,468 (13) | 8,373.47 (9.8) |
|
|
137Ce | 136.907806 (14) |
| 9 | h | -85,879 (13) | 8,366.96 (9.7) | B+ | 100 |
138Ce | 137.905991 (11) | 0.251 (2) | stable |
| -87,569 (10) | 8,377.06 (7.4) |
| |
139Ce | 138.9066527 (79) |
| 137.641 | d | -86,952.5 (7.3) | 8,370.43 (5.3) | EC | 100 |
140Ce | 139.9054387 (26) | 88.450 (51) | stable |
| -88,083.3 (2.5) | 8,376.37 (1.8) |
|
|
141Ce | 140.9082763 (26) |
| 32.508 | d | -85,440.1 (2.5) | 8,355.46 (1.7) | B- | 100 |
142Ce | 141.9092442 (32) | 11.114 (51) | stable |
| -84,538.5 (3) | 8,347.11 (2.1) |
|
|
143Ce | 142.9123859 (32) |
| 33.039 | h | -81,612.0 (3) | 8,324.72 (2.1) | B- | 100 |
144Ce | 143.9136473 (37) |
| 284.91 | d | -80,437.0 (3.4) | 8,314.80 (2.4) | B- | 100 |
145Ce | 144.917233 (45) |
| 3.01 | m | -77,097 (41) | 8,290.1 (2.9) | B- | 100 |
146Ce | 145.918759 (71) |
| 13.52 | m | -75,675 (66) | 8,278.8 (4.6) | B- | 100 |
147Ce | 146.922674 (33) |
| 56.4 | s | -72,029 (31) | 8,252.6 (2.1) | B- | 100 |
148Ce | 147.924432 (32) |
| 56 | s | -70,391 (29) | 8,240.3 (2) | B- | 100 |
149Ce | 148.92840 (10) |
| 5.3 | s | -66,695 (97) | 8,214.4 (6.5) | B- | 100 |
150Ce | 149.930409 (51) |
| 4 | s | -64,824 (48) | 8,201.0 (3.2) | B- | 100 |
151Ce | 150.93398 (11) |
| 1.02 | s | -61,500 (100) | 8,178.1 (6.8) | B- | 100 |
152Ce | 151.93654 (21) |
| 1.1 | s | -59,110 (200) | 8,162 (1) | B- | 100 |
153Ce | 152.94058 (43) |
| 500 | ms | -55,350 (400) | 8,137 (3) | B- ? |
|
154Ce | 153.94342 (54) |
| 300 | ms | -52,700 (500) | 8,119 (3) | B- ? |
|
155Ce | 154.94804 (64) |
| 200 | ms | -48,400 (600) | 8,091 (4) | B- ? |
|
156Ce | 155.95126 (64) |
| 150 | ms | -45,400 (600) | 8,071 (4) | B- ? |
|
157Ce | 156.95634 (75) |
| 50 | ms | -40,670 (700) | 8,041 (4) | B- ? |
|
127mCe | 126.922731 (62) |
| 34 | s | -71,976 (58) | 8,280.8 (4.6) | B+ | 100 |
129mCe | 128.918102 (30) |
| 62 | ns | -76,287 (28) | 8,310.9 (2.2) | IT | 100 |
130mCe | 129.914736 (30) |
| 100 | ns | -79,423 (28) | 8,333.2 (2.2) | IT | 100 |
131mCe | 130.914422 (36) |
| 5 | m | -79,715 (34) | 8,333.4 (2.6) | B+ | 100 |
132mCe | 131.911460 (22) |
| 9.4 | ms | -82,474 (21) | 8,352.4 (1.6) | IT | 100 |
133mCe | 132.911515 (18) |
| 4.9 | h | -82,423 (16) | 8,349.9 (1.2) | B+ | 100 |
135mCe | 134.909151 (12) |
| 20 | s | -84,625 (11) | 8,362.05 (8.2) | IT | 100 |
136mCe | 135.907172 (14) |
| 2.2 | us | -86,468 (13) | 8,373.47 (9.8) | IT | 100 |
137mCe | 136.907806 (14) |
| 34.4 | h | -85,879 (13) | 8,366.96 (9.7) | IT | 99.22 3 |
138mCe | 137.905991 (11) |
| 8.65 | ms | -87,569 (10) | 8,377.06 (7.4) | IT | 100 |
139mCe | 138.9066527 (79) |
| 56.54 | s | -86,952.5 (7.3) | 8,370.43 (5.3) | IT | 100 |
140mCe | 139.9054387 (26) |
| 7.3 | us | -88,083.3 (2.5) | 8,376.37 (1.8) | 0 |
|
131m1Ce | 130.914422 (36) |
| 70 | ns | -79,715 (34) | 8,333.4 (2.6) | 0 |
|
Data Source: ENSDF March 2005
©Radiochemistry Society 2005