Astatine Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
193At | 192.999843 (58) |
| ~40 | ms | -146 (54) | 7,727.5 (2.8) | A | 100 |
194At | 193.99873 (20) |
| ~40 | ms | -1,190 (190) | 7,734.7 (9.6) | A~100 |
|
195At | 194.9962681 (97) |
| 328 | ms | -3,476.2 (9.1) | 7,748.12 (4.6) | A~100 |
|
196At | 195.995788 (64) |
| 253 | ms | -3,923 (60) | 7,752.1 (3.1) | A | ? |
197At | 196.993189 (55) |
| 350 | ms | -6,344 (51) | 7,766.0 (2.6) | A | 96 4 |
198At | 197.992837 (53) |
| 4.2 | s | -6,672 (49) | 7,769.2 (2.5) | A>94 |
|
199At | 198.990532 (54) |
| 7.2 | s | -8,819 (50) | 7,781.5 (2.5) | A | 89 6 |
200At | 199.990351 (26) |
| 43.2 | s | -8,988 (24) | 7,783.8 (1.2) | A | 57 6 |
201At | 200.9884170 (89) |
| 85 | s | -10,789.5 (8.3) | 7,794.15 (4.1) | A | 71 7 |
202At | 201.988630 (30) |
| 184 | s | -10,591 (28) | 7,794.5 (1.4) | B+ | ? |
203At | 202.986942 (13) |
| 7.4 | m | -12,163 (12) | 7,803.65 (5.8) | B+ | 69 3 |
204At | 203.987251 (26) |
| 9.2 | m | -11,875 (24) | 7,803.6 (1.2) | B+ | 96.2 2 |
205At | 204.986074 (16) |
| 26.2 | m | -12,972 (15) | 7,810.21 (7.3) | B+ | 90 2 |
206At | 205.986667 (22) |
| 30.6 | m | -12,420 (20) | 7,808.79 (9.9) | B+ | 99.11 8 |
207At | 206.985784 (23) |
| 1.8 | h | -13,243 (21) | 7,814.0 (1) | B+ | 91.4 10 |
208At | 207.986590 (28) |
| 1.63 | h | -12,491 (26) | 7,811.7 (1.2) | B+ | 99.45 6 |
209At | 208.9861731 (80) |
| 5.41 | h | -12,879.6 (7.5) | 7,814.76 (3.6) | B+ | 95.9 5 |
210At | 209.9871477 (84) |
| 8.1 | h | -11,971.8 (7.8) | 7,811.66 (3.7) | B+~100 |
|
211At | 210.9874963 (30) |
| 7.214 | h | -11,647.1 (2.8) | 7,811.35 (1.3) | EC | 58.20 8 |
212At | 211.9907448 (77) |
| 314 | ms | -8,621.2 (7.2) | 7,798.31 (3.4) | A~100 | |
213At | 212.9929366 (53) |
| 125 | ns | -6,579.5 (4.9) | 7,790.00 (2.3) | A | 100 |
214At | 213.9963717 (46) |
| 558 | ns | -3,379.7 (4.3) | 7,776.37 (2) | A | 100 |
215At | 214.9986526 (73) |
| 100 | us | -1,255.1 (6.8) | 7,767.86 (3.2) | A | 100 |
216At | 216.0024233 (39) |
| 300 | us | 2,257.3 (3.6) | 7,753.00 (1.7) | A~100 |
|
217At | 217.0047188 (53) |
| 32.3 | ms | 4,395.6 (4.9) | 7,744.61 (2.3) | A~100 |
|
218At | 218.008694 (12) |
| 1.5 | s | 8,099 (12) | 7,729.12 (5.3) | A~100 |
|
219At | 219.0111617 (42) |
| 56 | s | 10,397.0 (3.9) | 7,720.19 (1.8) | A~97 |
|
220At | 220.015408 (55) |
| 3.71 | m | 14,352 (51) | 7,703.8 (2.3) | B- | 92 2 |
221At | 221.01805 (21) |
| 2.3 | m | 16,810 (200) | 7,694 (1) | B- | 100 |
222At | 222.02233 (32) |
| 54 | s | 20,800 (300) | 7,678 (1) | B- | 100 |
223At | 223.02519 (43) |
| 50 | s | 23,460 (400) | 7,668 (2) | B-~100 |
|
194mAt | 193.99873 (20) |
| ~250 | ms | -1,190 (190) | 7,734.7 (9.6) | A~100 |
|
195mAt | 194.9962681 (97) |
| 147 | ms | -3,476.2 (9.1) | 7,748.12 (4.6) | A | ? |
196mAt | 195.995788 (64) |
| 20 | ms | -3,923 (60) | 7,752.1 (3.1) | IT ? |
|
197mAt | 196.993189 (55) |
| 3.7 | s | -6,344 (51) | 7,766.0 (2.6) | A~100 |
|
198mAt | 197.992837 (53) |
| 1 | s | -6,672 (49) | 7,769.2 (2.5) | A>86 |
|
200mAt | 199.990351 (26) |
| 47 | s | -8,988 (24) | 7,783.8 (1.2) | A | 43 7 |
202mAt | 201.988630 (30) |
| 182 | s | -10,591 (28) | 7,794.5 (1.4) | IT ? |
|
204mAt | 203.987251 (26) |
| 108 | ms | -11,875 (24) | 7,803.6 (1.2) | IT | 100 |
205mAt | 204.986074 (16) |
| 67.9 | ns | -12,972 (15) | 7,810.21 (7.3) | 0 |
|
206mAt | 205.986667 (22) |
| 410 | ns | -12,420 (20) | 7,808.79 (9.9) | IT | 100 |
210mAt | 209.9871477 (84) |
| 482 | us | -11,971.8 (7.8) | 7,811.66 (3.7) | IT | 100 |
212mAt | 211.9907448 (77) |
| 119 | ms | -8,621.2 (7.2) | 7,798.31 (3.4) | A>99 |
|
214mAt | 213.9963717 (46) |
| 268 | ns | -3,379.7 (4.3) | 7,776.37 (2) | 0 |
|
216mAt | 216.0024233 (39) |
| 100 | us | 2,257.3 (3.6) | 7,753.00 (1.7) | A | 100 |
196m1At | 195.995788 (64) |
| 11 | us | -3,923 (60) | 7,752.1 (3.1) | IT ? |
|
200m1At | 199.990351 (26) |
| 3.5 | s | -8,988 (24) | 7,783.8 (1.2) | IT~84 |
|
202m1At | 201.988630 (30) |
| 460 | ms | -10,591 (28) | 7,794.5 (1.4) | IT~100 |
|
205m1At | 204.986074 (16) |
| 7.8 | us | -12,972 (15) | 7,810.21 (7.3) | 0 |
|
210m1At | 209.9871477 (84) |
| 5.66 | us | -11,971.8 (7.8) | 7,811.66 (3.7) | IT | 100 |
212m1At | 211.9907448 (77) |
| 152 | us | -8,621.2 (7.2) | 7,798.31 (3.4) | IT | 100 |
214m1At | 213.9963717 (46) |
| 760 | ns | -3,379.7 (4.3) | 7,776.37 (2) | 0 |
|
210m2At | 209.9871477 (84) |
| 98 | ns | -11,971.8 (7.8) | 7,811.66 (3.7) | IT | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005