Terbium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
136Tb | 135.96138 (64) |
| 200 | ms | -35,970 (600) | 7,962 (4) | B+ ? |
|
137Tb | 136.95598 (64) |
| 600 | ms | -41,000 (600) | 7,999 (4) | p ? |
|
138Tb | 137.95316 (43) |
| 800 | ms | -43,630 (400) | 8,019 (3) | B+ ? |
|
139Tb | 138.94829 (32) |
| 1.6 | s | -48,170 (300) | 8,052 (2) | B+ | 100 |
140Tb | 139.94581 (86) |
| 2.4 | s | -50,480 (800) | 8,069 (5.7) | B+ | 100 |
141Tb | 140.94145 (11) |
| 3.5 | s | -54,540 (110) | 8,097.5 (7.5) | B+ | 100 |
142Tb | 141.93874 (32) |
| 597 | ms | -57,060 (300) | 8,115 (2) | B+ | 100 |
143Tb | 142.935121 (64) |
| 12 | s | -60,434 (60) | 8,138.3 (4.2) | B+ | 100 |
144Tb | 143.933045 (30) |
| ~1 | s | -62,368 (28) | 8,151.3 (1.9) | B+ | 100 |
145Tb | 144.929274 (61) |
| 20 | m | -65,881 (57) | 8,175.0 (3.9) | B+ ? |
|
146Tb | 145.927247 (49) |
| 8 | s | -67,769 (45) | 8,187.2 (3.1) | B+ | 100 |
147Tb | 146.924045 (13) |
| 1.64 | h | -70,752 (12) | 8,206.69 (8.1) | B+ | 100 |
148Tb | 147.924272 (15) |
| 60 | m | -70,540 (14) | 8,204.34 (9.4) | B+ | 100 |
149Tb | 148.9232459 (46) |
| 4.118 | h | -71,496.0 (4.3) | 8,209.86 (2.9) | B+ | 83.3 17 |
150Tb | 149.9236597 (81) |
| 3.48 | h | -71,110.5 (7.6) | 8,206.37 (5) | B+~100 |
|
151Tb | 150.9231025 (49) |
| 17.609 | h | -71,629.5 (4.6) | 8,208.91 (3) | B+~100 |
|
152Tb | 151.924074 (43) |
| 17.5 | h | -70,724 (40) | 8,202.1 (2.6) | B+ | 100 |
153Tb | 152.9234346 (48) |
| 2.34 | d | -71,320.2 (4.5) | 8,205.09 (2.9) | B+ | 100 |
154Tb | 153.924678 (49) |
| 21.5 | h | -70,162 (45) | 8,196.7 (3) | B+~100 |
|
155Tb | 154.923505 (13) |
| 5.32 | d | -71,254 (12) | 8,202.94 (7.8) | EC | |
156Tb | 155.9247472 (47) |
| 5.35 | d | -70,097.5 (4.4) | 8,194.68 (2.8) | B+~100 |
|
157Tb | 156.9240246 (27) |
| 71 | y | -70,770.6 (2.5) | 8,198.18 (1.6) | EC | 100 |
158Tb | 157.9254131 (28) |
| 180 | y | -69,477.2 (2.6) | 8,189.20 (1.7) | B+ | 83.4 7 |
159Tb | 158.9253468 (27) | 100 | stable |
| -69,539.0 (2.6) | 8,188.84 (1.6) |
|
|
160Tb | 159.9271676 (27) |
| 72.3 | d | -67,842.9 (2.6) | 8,177.51 (1.6) | B- | 100 |
161Tb | 160.9275699 (28) |
| 6.906 | d | -67,468.2 (2.6) | 8,174.52 (1.6) | B- | 100 |
162Tb | 161.929488 (39) |
| 7.6 | m | -65,681 (36) | 8,162.9 (2.2) | B- | 100 |
163Tb | 162.9306475 (51) |
| 19.5 | m | -64,601.4 (4.7) | 8,155.67 (2.9) | B- | 100 |
164Tb | 163.93335 (11) |
| 3 | m | -62,080 (100) | 8,139.8 (6.1) | B- | 100 |
165Tb | 164.93488 (21) |
| 2.11 | m | -60,660 (200) | 8,131 (1) | B- | 100 |
166Tb | 165.93799 (11) |
| 25.6 | s | -57,760 (100) | 8,112.9 (6) | B- | 100 |
167Tb | 166.94005 (43) |
| 19 | s | -55,840 (400) | 8,101 (2) | B- | 100 |
168Tb | 167.94364 (54) |
| 8.2 | s | -52,500 (500) | 8,081 (3) | B- | 100 |
169Tb | 168.94622 (64) |
| 2 | s | -50,100 (600) | 8,067 (4) | B- ? |
|
170Tb | 169.95025 (75) |
| 3 | s | -46,340 (700) | 8,045 (4) | B- ? |
|
171Tb | 170.95330 (86) |
| 500 | ms | -43,500 (800) | 8,028 (5) | B- ? |
|
141mTb | 140.94145 (11) |
| 7.9 | s | -54,540 (110) | 8,097.5 (7.5) | B+ | 100 |
142mTb | 141.93874 (32) |
| 303 | ms | -57,060 (300) | 8,115 (2) | IT~100 |
|
143mTb | 142.935121 (64) |
| <21 | s | -60,434 (60) | 8,138.3 (4.2) | B+ ? |
|
144mTb | 143.933045 (30) |
| 4.25 | s | -62,368 (28) | 8,151.3 (1.9) | IT | 66 |
145mTb | 144.929274 (61) |
| 30.9 | s | -65,881 (57) | 8,175.0 (3.9) | B+ | 100 |
146mTb | 145.927247 (49) |
| 24.1 | s | -67,769 (45) | 8,187.2 (3.1) | B+ | 100 |
147mTb | 146.924045 (13) |
| 1.87 | m | -70,752 (12) | 8,206.69 (8.1) | B+ | 100 |
148mTb | 147.924272 (15) |
| 2.2 | m | -70,540 (14) | 8,204.34 (9.4) | B+ | 100 |
149mTb | 148.9232459 (46) |
| 4.16 | m | -71,496.0 (4.3) | 8,209.86 (2.9) | B+~100 |
|
150mTb | 149.9236597 (81) |
| 5.8 | m | -71,110.5 (7.6) | 8,206.37 (5) | B+~100 |
|
151mTb | 150.9231025 (49) |
| 25 | s | -71,629.5 (4.6) | 8,208.91 (3) | IT | 93.8 4 |
152mTb | 151.924074 (43) |
| 4.2 | m | -70,724 (40) | 8,202.1 (2.6) | IT | 78.8 8 |
153mTb | 152.9234346 (48) |
| 186 | us | -71,320.2 (4.5) | 8,205.09 (2.9) | IT | 100 |
154mTb | 153.924678 (49) |
| 9.4 | h | -70,162 (45) | 8,196.7 (3) | B+ | 78.2 7 |
156mTb | 155.9247472 (47) |
| 24.4 | h | -70,097.5 (4.4) | 8,194.68 (2.8) | IT | 100 |
158mTb | 157.9254131 (28) |
| 10.7 | s | -69,477.2 (2.6) | 8,189.20 (1.7) | IT~100 |
|
144m1Tb | 143.933045 (30) |
| 2.8 | us | -62,368 (28) | 8,151.3 (1.9) | IT | 100 |
146m1Tb | 145.927247 (49) |
| 1.18 | ms | -67,769 (45) | 8,187.2 (3.1) | IT | 100 |
148m1Tb | 147.924272 (15) |
| 1.31 | us | -70,540 (14) | 8,204.34 (9.4) | IT | 100 |
154m1Tb | 153.924678 (49) |
| 22.7 | h | -70,162 (45) | 8,196.7 (3) | B+ | 98.2 6 |
156m1Tb | 155.9247472 (47) |
| 5.3 | h | -70,097.5 (4.4) | 8,194.68 (2.8) | IT | ? |
158m1Tb | 157.9254131 (28) |
| 395 | us | -69,477.2 (2.6) | 8,189.20 (1.7) | 0 |
|
144m2Tb | 143.933045 (30) |
| 670 | ns | -62,368 (28) | 8,151.3 (1.9) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005