Gadolinium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
134Gd | 133.95537 (43) |
| 400 | ms | -41,570 (400) | 8,008 (3) | B+ ? |
|
135Gd | 134.95257 (54) |
| 1.1 | s | -44,180 (500) | 8,028 (4) | B+ | 100 |
136Gd | 135.94734 (43) |
| 1 | s | -49,050 (400) | 8,064 (3) | B+ ? |
|
137Gd | 136.94502 (43) |
| 2.2 | s | -51,210 (400) | 8,080 (3) | B+ | 100 |
138Gd | 137.94012 (21) |
| 4.7 | s | -55,780 (200) | 8,113 (1) | B+ | 100 |
139Gd | 138.93824 (21) |
| 5.7 | s | -57,530 (200) | 8,125 (1) | B+ | 100 |
140Gd | 139.933674 (30) |
| 15.8 | s | -61,782 (28) | 8,155.0 (2) | B+ | 100 |
141Gd | 140.932126 (21) |
| 14 | s | -63,224 (20) | 8,164.6 (1.4) | B+ | 100 |
142Gd | 141.928116 (30) |
| 70.2 | s | -66,960 (28) | 8,190.3 (2) | B+ | 100 |
143Gd | 142.92675 (22) |
| 39 | s | -68,230 (200) | 8,198 (1.4) | B+ | 100 |
144Gd | 143.922963 (30) |
| 4.47 | m | -71,760 (28) | 8,221.9 (1.9) | B+ | 100 |
145Gd | 144.921709 (20) |
| 23 | m | -72,927 (19) | 8,229.0 (1.3) | B+ | 100 |
146Gd | 145.9183106 (51) |
| 48.27 | d | -76,093.2 (4.7) | 8,249.56 (3.2) | EC | 100 |
147Gd | 146.9190944 (33) |
| 38.06 | h | -75,363.1 (3) | 8,243.38 (2.1) | B+ | 100 |
148Gd | 147.9181145 (30) |
| 74.6 | y | -76,275.8 (2.8) | 8,248.38 (1.9) | A | 100 |
149Gd | 148.9193409 (42) |
| 9.28 | d | -75,133.5 (4) | 8,239.53 (2.7) | B+ | 100 |
150Gd | 149.9186589 (68) |
| 1.79 | My | -75,768.8 (6.3) | 8,242.64 (4.2) | A | 100 |
151Gd | 150.9203485 (39) |
| 124 | d | -74,194.9 (3.7) | 8,231.08 (2.4) | EC | 100 |
152Gd | 151.9197910 (27) | 0.20 (1) | 108 | Ty | -74,714.2 (2.5) | 8,233.45 (1.7) |
|
|
153Gd | 152.9217495 (27) |
| 240.4 | d | -72,889.8 (2.5) | 8,220.47 (1.6) | EC | |
154Gd | 153.9208656 (27) | 2.18 (3) | stable |
| -73,713.2 (2.5) | 8,224.84 (1.6) |
|
|
155Gd | 154.9226220 (27) | 14.80 (12) | stable |
| -72,077.1 (2.5) | 8,213.30 (1.6) |
|
|
156Gd | 155.9221227 (27) | 20.47 (9) | stable |
| -72,542.2 (2.5) | 8,215.37 (1.6) |
|
|
157Gd | 156.9239601 (27) | 15.65 (2) | stable |
| -70,830.7 (2.5) | 8,203.55 (1.6) |
|
|
158Gd | 157.9241039 (27) | 24.84 (7) | stable |
| -70,696.8 (2.5) | 8,201.87 (1.6) |
|
|
159Gd | 158.9263887 (27) |
| 18.479 | h | -68,568.5 (2.5) | 8,187.66 (1.6) | B- | 100 |
160Gd | 159.9270541 (27) | 21.86 (19) | stable |
| -67,948.6 (2.6) | 8,183.06 (1.6) |
|
|
161Gd | 160.9296692 (29) |
| 3.646 | m | -65,512.7 (2.7) | 8,167.23 (1.7) | B- | 100 |
162Gd | 161.9309848 (49) |
| 8.4 | m | -64,287.3 (4.6) | 8,159.08 (2.8) | B- | 100 |
163Gd | 162.93399 (32) |
| 68 | s | -61,490 (300) | 8,141 (2) | B- | 100 |
164Gd | 163.93586 (43) |
| 45 | s | -59,750 (400) | 8,130 (2) | B- | 100 |
165Gd | 164.93938 (54) |
| 10.3 | s | -56,470 (500) | 8,110 (3) | B- | 100 |
166Gd | 165.94160 (64) |
| 4.8 | s | -54,400 (600) | 8,097 (4) | B- | 100 |
167Gd | 166.94557 (64) |
| 3 | s | -50,700 (600) | 8,075 (4) | B- ? |
|
168Gd | 167.94836 (75) |
| 300 | ms | -48,100 (700) | 8,060 (4) | B- ? |
|
169Gd | 168.95287 (86) |
| 1 | s | -43,900 (800) | 8,035 (5) | B- ? |
|
138mGd | 137.94012 (21) |
| 6 | us | -55,780 (200) | 8,113 (1) | 0 |
|
139mGd | 138.93824 (21) |
| 4.8 | s | -57,530 (200) | 8,125 (1) | B+ | 100 |
141mGd | 140.932126 (21) |
| 24.5 | s | -63,224 (20) | 8,164.6 (1.4) | B+ | 89 2 |
143mGd | 142.92675 (22) |
| 110 | s | -68,230 (200) | 8,198 (1.4) | B+ | 100 |
145mGd | 144.921709 (20) |
| 85 | s | -72,927 (19) | 8,229.0 (1.3) | IT | 94.3 5 |
147mGd | 146.9190944 (33) |
| 510 | ns | -75,363.1 (3) | 8,243.38 (2.1) | IT | 100 |
153mGd | 152.9217495 (27) |
| 3.5 | us | -72,889.8 (2.5) | 8,220.47 (1.6) | IT | 100 |
155mGd | 154.9226220 (27) |
| 32 | ms | -72,077.1 (2.5) | 8,213.30 (1.6) | IT | 100 |
156mGd | 155.9221227 (27) |
| 1.3 | us | -72,542.2 (2.5) | 8,215.37 (1.6) | IT | 100 |
153m1Gd | 152.9217495 (27) |
| 76 | us | -72,889.8 (2.5) | 8,220.47 (1.6) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005