Tantalum Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
155Ta | 154.97459 (54) |
| 13 | us | -23,670 (500) | 7,856 (3) | p | 100 |
156Ta | 155.97230 (43) |
| 144 | ms | -25,800 (400) | 7,871 (3) | p~100 |
|
157Ta | 156.96819 (22) |
| 10.1 | ms | -29,630 (210) | 7,896 (1.3) | A | ? |
158Ta | 157.96670 (22) |
| 49 | ms | -31,020 (200) | 7,906 (1) | A | 96 4 |
159Ta | 158.963018 (22) |
| 1.04 | s | -34,448 (21) | 7,928.8 (1.3) | B+ ? |
|
160Ta | 159.961486 (96) |
| 1.7 | s | -35,876 (89) | 7,938.6 (5.6) | B+ ? |
|
161Ta | 160.958417 (59) |
| 3 | s | -38,734 (55) | 7,957 (0) | B+ ? |
|
162Ta | 161.957292 (56) |
| 3.57 | s | -39,782 (52) | 7,964.3 (3.2) | B+~100 |
|
163Ta | 162.954330 (41) |
| 10.6 | s | -42,541 (38) | 7,981.9 (2.3) | B+~100 |
|
164Ta | 163.953534 (30) |
| 14.2 | s | -43,283 (28) | 7,987.0 (1.7) | B+ | 100 |
165Ta | 164.950773 (19) |
| 31 | s | -45,855 (17) | 8,003.1 (1) | B+ | 100 |
166Ta | 165.950512 (30) |
| 34.4 | s | -46,098 (28) | 8,005.0 (1.7) | B+ | 100 |
167Ta | 166.948093 (30) |
| 1.33 | m | -48,351 (28) | 8,018.9 (1.7) | B+ | 100 |
168Ta | 167.948047 (30) |
| 2 | m | -48,394 (28) | 8,019.4 (1.7) | B+ | 100 |
169Ta | 168.946011 (30) |
| 4.9 | m | -50,290 (28) | 8,031.0 (1.6) | B+ | 100 |
170Ta | 169.946175 (30) |
| 6.76 | m | -50,138 (28) | 8,030.3 (1.6) | B+ | 100 |
171Ta | 170.944476 (30) |
| 23.3 | m | -51,720 (28) | 8,039.8 (1.6) | B+ | 100 |
172Ta | 171.944895 (30) |
| 36.8 | m | -51,330 (28) | 8,037.7 (1.6) | B+ | 100 |
173Ta | 172.943750 (30) |
| 3.14 | h | -52,397 (28) | 8,044.1 (1.6) | B+ | 100 |
174Ta | 173.944454 (30) |
| 1.14 | h | -51,741 (28) | 8,040.5 (1.6) | B+ | |
175Ta | 174.943737 (30) |
| 10.5 | h | -52,409 (28) | 8,044.4 (1.6) | B+ | 100 |
176Ta | 175.944857 (33) |
| 8.09 | h | -51,365 (31) | 8,038.7 (1.8) | B+ | 100 |
177Ta | 176.9444724 (40) |
| 56.56 | h | -51,723.6 (3.7) | 8,040.88 (2.1) | B+ | 100 |
178Ta | 177.945778 (16) |
| 9.31 | m | -50,507 (15) | 8,034.22 (8.5) | B+ | 100 |
179Ta | 178.9459295 (23) |
| 1.82 | y | -50,366.3 (2.2) | 8,033.64 (1.2) | EC | 100 |
180Ta | 179.9474648 (24) |
| 8.152 | h | -48,936.2 (2.2) | 8,025.90 (1.2) | EC | 86 3 |
181Ta | 180.9479958 (19) | 99.988 (2) | stable |
| -48,441.6 (1.8) | 8,023.42 (1) |
|
|
182Ta | 181.9501518 (19) |
| 114.43 | d | -46,433.3 (1.8) | 8,012.65 (1) | B- | 100 |
183Ta | 182.9513726 (19) |
| 5.1 | d | -45,296.1 (1.8) | 8,006.75 (1) | B- | 100 |
184Ta | 183.954008 (28) |
| 8.7 | h | -42,841 (26) | 7,993.8 (1.4) | B- | 100 |
185Ta | 184.955559 (15) |
| 49.4 | m | -41,396 (14) | 7,986.37 (7.7) | B- | 100 |
186Ta | 185.958552 (64) |
| 10.5 | m | -38,609 (60) | 7,971.8 (3.2) | B- | 100 |
187Ta | 186.96053 (21) |
| 2 | m | -36,770 (200) | 7,963 (1) | B- ? |
|
188Ta | 187.96370 (21) |
| 20 | s | -33,810 (200) | 7,947 (1) | B- ? |
|
189Ta | 188.96583 (32) |
| 3 | s | -31,830 (300) | 7,938 (2) | B- ? |
|
190Ta | 189.96923 (43) |
| 300 | ms | -28,660 (400) | 7,922 (2) | B- ? |
|
156mTa | 155.97230 (43) |
| 360 | ms | -25,800 (400) | 7,871 (3) | B+ | 95.8 9 |
157mTa | 156.96819 (22) |
| 4.3 | ms | -29,630 (210) | 7,896 (1.3) | A | ? |
158mTa | 157.96670 (22) |
| 36 | ms | -31,020 (200) | 7,906 (1) | A | 93 6 |
159mTa | 158.963018 (22) |
| 514 | ms | -34,448 (21) | 7,928.8 (1.3) | A | 55 1 |
160mTa | 159.961486 (96) |
| 1.55 | s | -35,876 (89) | 7,938.6 (5.6) | B+ | 66# |
161mTa | 160.958417 (59) |
| 2.89 | s | -38,734 (55) | 7,957 (0) | B+ | 95# |
176mTa | 175.944857 (33) |
| 1.1 | ms | -51,365 (31) | 8,038.7 (1.8) | IT | 100 |
177mTa | 176.9444724 (40) |
| 3.62 | us | -51,723.6 (3.7) | 8,040.88 (2.1) | IT | 100 |
178mTa | 177.945778 (16) |
| 2.36 | h | -50,507 (15) | 8,034.22 (8.5) | B+ | 100 |
179mTa | 178.9459295 (23) |
| 9 | ms | -50,366.3 (2.2) | 8,033.64 (1.2) | IT | 100 |
180mTa | 179.9474648 (24) | 0.012 (2) | stable |
| -48,936.2 (2.2) | 8,025.90 (1.2) |
|
|
181mTa | 180.9479958 (19) |
| 6.05 | us | -48,441.6 (1.8) | 8,023.42 (1) | IT | 100 |
182mTa | 181.9501518 (19) |
| 283 | ms | -46,433.3 (1.8) | 8,012.65 (1) | IT | 100 |
183mTa | 182.9513726 (19) |
| 107 | ns | -45,296.1 (1.8) | 8,006.75 (1) | IT | 100 |
185mTa | 184.955559 (15) |
| >1 | ms | -41,396 (14) | 7,986.37 (7.7) | IT | 100 |
157m1Ta | 156.96819 (22) |
| 1.7 | ms | -29,630 (210) | 7,896 (1.3) | A | 100 |
176m1Ta | 175.944857 (33) |
| 0.97 | ms | -51,365 (31) | 8,038.7 (1.8) | IT | 100 |
177m1Ta | 176.9444724 (40) |
| 5.31 | us | -51,723.6 (3.7) | 8,040.88 (2.1) | IT | 100 |
178m1Ta | 177.945778 (16) |
| 59 | ms | -50,507 (15) | 8,034.22 (8.5) | IT | 100 |
179m1Ta | 178.9459295 (23) |
| 54.1 | ms | -50,366.3 (2.2) | 8,033.64 (1.2) | IT | 100 |
180m1Ta | 179.9474648 (24) |
| 45 | us | -48,936.2 (2.2) | 8,025.90 (1.2) | 0 |
|
181m1Ta | 180.9479958 (19) |
| 25 | us | -48,441.6 (1.8) | 8,023.42 (1) | IT | 100 |
182m1Ta | 181.9501518 (19) |
| 15.84 | m | -46,433.3 (1.8) | 8,012.65 (1) | IT | 100 |
165m2Ta | 164.950773 (19) |
|
|
| -45,855 (17) | 8,003.1 (1) | 0 |
|
177m2Ta | 176.9444724 (40) |
| 410 | ns | -51,723.6 (3.7) | 8,040.88 (2.1) | IT | 100 |
178m2Ta | 177.945778 (16) |
| 290 | ms | -50,507 (15) | 8,034.22 (8.5) | 0 |
|
181m2Ta | 180.9479958 (19) |
| 210 | us | -48,441.6 (1.8) | 8,023.42 (1) | IT | 100 |
177m3Ta | 176.9444724 (40) |
| 133 | us | -51,723.6 (3.7) | 8,040.88 (2.1) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005