Protactinium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
212Pa | 212.023204 (80) |
| 8 | ms | 21,615 (75) | 7,633.5 (3.5) | A | 100 |
213Pa | 213.021109 (76) |
| 7 | ms | 19,663 (71) | 7,644.8 (3.3) | A | 100 |
214Pa | 214.020918 (82) |
| 17 | ms | 19,485 (76) | 7,647.6 (3.6) | A | 100 |
215Pa | 215.019186 (93) |
| 14 | ms | 17,872 (87) | 7,657.1 (4) | A | 100 |
216Pa | 216.019110 (75) |
| 105 | ms | 17,800 (70) | 7,659.3 (3.2) | A | ? |
217Pa | 217.018324 (56) |
| 3.48 | ms | 17,069 (52) | 7,664.6 (2.4) | A | 100 |
218Pa | 218.020042 (26) |
| 113 | us | 18,669 (25) | 7,659.1 (1.1) | A | 100 |
219Pa | 219.019883 (58) |
| 53 | ns | 18,521 (54) | 7,661.7 (2.5) | A | 100 |
220Pa | 220.021875 (61) |
| 780 | ns | 20,377 (57) | 7,655.1 (2.6) | A | 100 |
221Pa | 221.021878 (55) |
| 5.9 | us | 20,379 (52) | 7,657.0 (2.3) | A | 100 |
222Pa | 222.023742 (78) |
| 3.2 | ms | 22,116 (73) | 7,651 (0) | A | 100 |
223Pa | 223.023962 (76) |
| 5.1 | ms | 22,321 (71) | 7,652.0 (3.2) | A | 100 |
224Pa | 224.025626 (17) |
| 844 | ms | 23,870 (16) | 7,646.93 (6.9) | A~100 |
|
225Pa | 225.026131 (76) |
| 1.7 | s | 24,341 (71) | 7,646.7 (3.2) | A | 100 |
226Pa | 226.027948 (12) |
| 1.8 | m | 26,033 (11) | 7,641.11 (5.1) | A | 74 5 |
227Pa | 227.0288051 (80) |
| 38.3 | m | 26,831.8 (7.5) | 7,639.49 (3.3) | A | 85 2 |
228Pa | 228.0310514 (47) |
| 22 | h | 28,924.2 (4.4) | 7,632.20 (1.9) | B+ | 98.0 2 |
229Pa | 229.0320968 (30) |
| 1.5 | d | 29,898.0 (2.7) | 7,629.87 (1.2) | EC~100 |
|
230Pa | 230.0345408 (35) |
| 17.4 | d | 32,174.5 (3.3) | 7,621.89 (1.4) | B+ | 91.6 13 |
231Pa | 231.0358840 (24) |
| 32.76 | ky | 33,425.7 (2.3) | 7,618.42 (1) | A | |
232Pa | 232.0385916 (83) |
| 1.31 | d | 35,947.8 (7.7) | 7,609.50 (3.3) | B-~100 |
|
233Pa | 233.0402473 (23) |
| 26.967 | d | 37,490.1 (2.2) | 7,604.864 (9) | B- | 100 |
234Pa | 234.0433081 (51) |
| 6.7 | h | 40,341.2 (4.7) | 7,594.67 (2) | B- | 100 |
235Pa | 235.045444 (54) |
| 24.44 | m | 42,330 (50) | 7,588.2 (2.1) | B- | 100 |
236Pa | 236.04868 (21) |
| 9.1 | m | 45,350 (200) | 7,577.5 (8.5) | B- | 100 |
237Pa | 237.05115 (11) |
| 8.7 | m | 47,640 (100) | 7,569.9 (4.2) | B- | 100 |
238Pa | 238.054503 (64) |
| 2.27 | m | 50,769 (60) | 7,558.9 (2.5) | B- | 100 |
239Pa | 239.05726 (21) |
| 1.8 | h | 53,340 (200) | 7,550 (1) | B- | 100 |
240Pa | 240.06098 (32) |
| 2 | m | 56,800 (300) | 7,538 (1) | B- ? |
|
217mPa | 217.018324 (56) |
| 1.08 | ms | 17,069 (52) | 7,664.6 (2.4) | A | 73 4 |
229mPa | 229.0320968 (30) |
| 420 | ns | 29,898.0 (2.7) | 7,629.87 (1.2) | IT | 100 |
234mPa | 234.0433081 (51) |
| 1.17 | m | 40,341.2 (4.7) | 7,594.67 (2) | B-~100 |
|
Data Source: ENSDF March 2005
©Radiochemistry Society 2005