Hafnium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
153Hf | 152.97069 (54) |
| 400 | ms | -27,300 (500) | 7,882 (3) | B+ ? |
|
154Hf | 153.96486 (54) |
| 2 | s | -32,730 (500) | 7,918 (3) | B+~100 |
|
155Hf | 154.96339 (43) |
| 890 | ms | -34,100 (400) | 7,928 (3) | B+~100 |
|
156Hf | 155.95936 (22) |
| 23 | ms | -37,850 (210) | 7,953 (1.3) | A | 97 3 |
157Hf | 156.95840 (21) |
| 115 | ms | -38,750 (200) | 7,959 (1) | A | 86 9 |
158Hf | 157.954799 (19) |
| 2.84 | s | -42,104 (18) | 7,981.3 (1.1) | B+ | 55 3 |
159Hf | 158.953995 (18) |
| 5.2 | s | -42,854 (17) | 7,986.6 (1.1) | B+ | 65 7 |
160Hf | 159.950684 (12) |
| 13.6 | s | -45,937 (12) | 8,006.37 (7.2) | B+ | 99.3 2 |
161Hf | 160.950275 (24) |
| 18.2 | s | -46,319 (23) | 8,009.1 (1.4) | B+~100 |
|
162Hf | 161.947210 (10) |
| 39.4 | s | -49,173.1 (9.6) | 8,027.15 (5.9) | B+~100 |
|
163Hf | 162.947089 (30) |
| 40 | s | -49,286 (28) | 8,028.1 (1.7) | B+ | 100 |
164Hf | 163.944367 (22) |
| 111 | s | -51,822 (20) | 8,043.8 (1.2) | B+ | 100 |
165Hf | 164.944567 (30) |
| 76 | s | -51,636 (28) | 8,042.9 (1.7) | B+ | 100 |
166Hf | 165.942180 (30) |
| 6.77 | m | -53,859 (28) | 8,056.4 (1.7) | B+ | 100 |
167Hf | 166.942600 (30) |
| 2.05 | m | -53,468 (28) | 8,054.2 (1.7) | B+ | 100 |
168Hf | 167.940568 (30) |
| 25.95 | m | -55,361 (28) | 8,065.6 (1.7) | EC~98 |
|
169Hf | 168.941259 (30) |
| 3.24 | m | -54,717 (28) | 8,061.8 (1.6) | B+ | 100 |
170Hf | 169.939609 (30) |
| 16.01 | h | -56,254 (28) | 8,070.9 (1.6) | EC | 100 |
171Hf | 170.940492 (31) |
| 12.1 | h | -55,431 (29) | 8,066.1 (1.7) | B+ | 100 |
172Hf | 171.939448 (26) |
| 1.87 | y | -56,404 (24) | 8,071.8 (1.4) | EC | |
173Hf | 172.940513 (30) |
| 23.6 | h | -55,412 (28) | 8,066.0 (1.6) | B+ | 100 |
174Hf | 173.9400462 (30) | 0.16 (1) | 2 | Py | -55,846.6 (2.8) | 8,068.55 (1.6) |
|
|
175Hf | 174.9415092 (30) |
| 70 | d | -54,483.8 (2.8) | 8,060.77 (1.6) | EC | 100 |
176Hf | 175.9414086 (24) | 5.26 (7) | stable |
| -54,577.5 (2.2) | 8,061.37 (1.3) |
|
|
177Hf | 176.9432207 (23) | 18.60 (9) | stable |
| -52,889.6 (2.1) | 8,051.89 (1.2) |
|
|
178Hf | 177.9436988 (23) | 27.28 (7) | stable |
| -52,444.3 (2.1) | 8,049.49 (1.2) |
|
|
179Hf | 178.9458161 (23) | 13.62 (2) | stable |
| -50,471.9 (2.1) | 8,038.60 (1.2) |
|
|
180Hf | 179.9465500 (23) | 35.08 (16) | stable |
| -49,788.4 (2.1) | 8,034.98 (1.2) |
|
|
181Hf | 180.9491012 (23) |
| 42.39 | d | -47,411.9 (2.1) | 8,022.05 (1.2) | B- | 100 |
182Hf | 181.9505541 (68) |
| 9 | My | -46,058.6 (6.4) | 8,014.89 (3.5) | B- | 100 |
183Hf | 182.953530 (32) |
| 1.067 | h | -43,286 (30) | 8,000.0 (1.6) | B- | 100 |
184Hf | 183.955447 (43) |
| 4.12 | h | -41,501 (40) | 7,990.7 (2.2) | B- | 100 |
185Hf | 184.95882 (21) |
| 3.5 | m | -38,360 (200) | 7,974 (1) | B- | 100 |
186Hf | 185.96089 (32) |
| 2.6 | m | -36,430 (300) | 7,964 (2) | B- | 100 |
187Hf | 186.96459 (43) |
| 30 | s | -32,980 (400) | 7,946 (2) | B- ? |
|
188Hf | 187.96685 (54) |
| 20 | s | -30,880 (500) | 7,936 (3) | B- ? |
|
153mHf | 152.97069 (54) |
| 500 | ms | -27,300 (500) | 7,882 (3) | B+ ? |
|
156mHf | 155.95936 (22) |
| 480 | us | -37,850 (210) | 7,953 (1.3) | A | 100 |
171mHf | 170.940492 (31) |
| 29.5 | s | -55,431 (29) | 8,066.1 (1.7) | IT~100 |
|
172mHf | 171.939448 (26) |
| 163 | ns | -56,404 (24) | 8,071.8 (1.4) | 0 |
|
174mHf | 173.9400462 (30) |
| 2.39 | us | -55,846.6 (2.8) | 8,068.55 (1.6) | IT | 100 |
177mHf | 176.9432207 (23) |
| 1.09 | s | -52,889.6 (2.1) | 8,051.89 (1.2) | IT | 100 |
178mHf | 177.9436988 (23) |
| 4 | s | -52,444.3 (2.1) | 8,049.49 (1.2) | IT | 100 |
179mHf | 178.9458161 (23) |
| 18.67 | s | -50,471.9 (2.1) | 8,038.60 (1.2) | IT | 100 |
180mHf | 179.9465500 (23) |
| 5.5 | h | -49,788.4 (2.1) | 8,034.98 (1.2) | IT~100 |
|
181mHf | 180.9491012 (23) |
| 80 | us | -47,411.9 (2.1) | 8,022.05 (1.2) | IT | 100 |
182mHf | 181.9505541 (68) |
| 61.5 | m | -46,058.6 (6.4) | 8,014.89 (3.5) | B- | 58 3 |
184mHf | 183.955447 (43) |
| 48 | s | -41,501 (40) | 7,990.7 (2.2) | B- | 100 |
177m1Hf | 176.9432207 (23) |
| 51.4 | m | -52,889.6 (2.1) | 8,051.89 (1.2) | IT | 100 |
178m1Hf | 177.9436988 (23) |
| 31 | y | -52,444.3 (2.1) | 8,049.49 (1.2) | IT | 100 |
179m1Hf | 178.9458161 (23) |
| 25.05 | d | -50,471.9 (2.1) | 8,038.60 (1.2) | IT | 100 |
181m1Hf | 180.9491012 (23) |
| ~100 | us | -47,411.9 (2.1) | 8,022.05 (1.2) | IT | 100 |
177m2Hf | 176.9432207 (23) |
| 55.9 | us | -52,889.6 (2.1) | 8,051.89 (1.2) | IT | 100 |
178m2Hf | 177.9436988 (23) |
| 68 | us | -52,444.3 (2.1) | 8,049.49 (1.2) | IT | 100 |
181m2Hf | 180.9491012 (23) |
| 1.5 | ms | -47,411.9 (2.1) | 8,022.05 (1.2) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005