Praseodymium Isotopic Data
Isotope |
Isotopic Mass amu |
% Abundance |
T1/2 |
T1/2 Units |
Mass Excess KeV |
Binding Energy Per Nucleon KeV |
Decay Mode |
Branching Ratio |
121Pr | 120.95536 (75) |
| 600 | ms | -41,580 (700) | 8,033 (6) | p | ? |
122Pr | 121.95181 (54) |
| 500 | ms | -44,890 (500) | 8,061 (4) | B+ ? |
|
123Pr | 122.94596 (64) |
| 800 | ms | -50,340 (600) | 8,105 (5) | B+ ? |
|
124Pr | 123.94296 (64) |
| 1.2 | s | -53,130 (600) | 8,128 (5) | B+ | 100 |
125Pr | 124.93783 (43) |
| 3.3 | s | -57,910 (400) | 8,165 (3) | B+ | 100 |
126Pr | 125.93531 (21) |
| 3.12 | s | -60,260 (200) | 8,183 (2) | B+ | 100 |
127Pr | 126.93083 (21) |
| 4.2 | s | -64,430 (200) | 8,215 (2) | B+ | 100 |
128Pr | 127.928791 (32) |
| 2.84 | s | -66,331 (30) | 8,228.9 (2.3) | B+ | 100 |
129Pr | 128.925095 (32) |
| 30 | s | -69,774 (30) | 8,254.4 (2.3) | B+ | 100 |
130Pr | 129.923590 (69) |
| 40 | s | -71,175 (64) | 8,263.8 (4.9) | B+ | 100 |
131Pr | 130.920259 (56) |
| 1.5 | m | -74,278 (52) | 8,286.0 (4) | B+ | 100 |
132Pr | 131.919255 (61) |
| 1.49 | m | -75,213 (57) | 8,291.4 (4.3) | B+ | 100 |
133Pr | 132.916331 (13) |
| 6.5 | m | -77,938 (12) | 8,310.26 (9.4) | B+ | 100 |
134Pr | 133.915712 (38) |
| ~11 | m | -78,514 (35) | 8,312.8 (2.6) | B+ | 100 |
135Pr | 134.913112 (13) |
| 24 | m | -80,936 (12) | 8,328.93 (8.8) | B+ | 100 |
136Pr | 135.912692 (13) |
| 13.1 | m | -81,327 (12) | 8,329.91 (9) | B+ | 100 |
137Pr | 136.910705 (13) |
| 1.28 | h | -83,177 (12) | 8,341.53 (8.6) | B+ | 100 |
138Pr | 137.910755 (15) |
| 1.45 | m | -83,132 (14) | 8,339.2 (1) | B+ | 100 |
139Pr | 138.9089384 (85) |
| 4.41 | h | -84,823.3 (7.9) | 8,349.48 (5.7) | B+ | 100 |
140Pr | 139.9090759 (70) |
| 3.39 | m | -84,695.3 (6.5) | 8,346.58 (4.6) | B+ | |
141Pr | 140.9076528 (26) | 100 | stable |
| -86,020.9 (2.5) | 8,354.03 (1.8) |
|
|
142Pr | 141.9100448 (26) |
| 19.12 | h | -83,792.7 (2.5) | 8,336.35 (1.7) | B-~100 |
|
143Pr | 142.9108169 (28) |
| 13.57 | d | -83,073.5 (2.6) | 8,329.46 (1.8) | B- | 100 |
144Pr | 143.9133052 (36) |
| 17.28 | m | -80,755.6 (3.3) | 8,311.58 (2.3) | B- | 100 |
145Pr | 144.9145117 (80) |
| 5.984 | h | -79,631.8 (7.4) | 8,302.17 (5.1) | B- | 100 |
146Pr | 145.917644 (66) |
| 24.15 | m | -76,714 (62) | 8,280.6 (4.2) | B- | 100 |
147Pr | 146.918996 (25) |
| 13.4 | m | -75,455 (23) | 8,270.6 (1.6) | B- | 100 |
148Pr | 147.922135 (28) |
| 2.29 | m | -72,531 (26) | 8,249.5 (1.8) | B- | 100 |
149Pr | 148.923718 (88) |
| 2.26 | m | -71,057 (82) | 8,238.4 (5.5) | B- | 100 |
150Pr | 149.926673 (28) |
| 6.19 | s | -68,304 (26) | 8,219.0 (1.8) | B- | 100 |
151Pr | 150.928319 (25) |
| 18.9 | s | -66,771 (23) | 8,207.8 (1.5) | B- | 100 |
152Pr | 151.93150 (13) |
| 3.63 | s | -63,810 (120) | 8,187.4 (8.1) | B- | 100 |
153Pr | 152.93384 (11) |
| 4.28 | s | -61,630 (100) | 8,172.4 (6.8) | B- | 100 |
154Pr | 153.93752 (16) |
| 2.3 | s | -58,200 (150) | 8,149.5 (9.8) | B- | 100 |
155Pr | 154.94012 (32) |
| 1 | s | -55,780 (300) | 8,133 (2) | B- ? |
|
156Pr | 155.94427 (43) |
| 500 | ms | -51,910 (400) | 8,108 (3) | B- ? |
|
157Pr | 156.94743 (43) |
| 300 | ms | -48,970 (400) | 8,089 (3) | B- ? |
|
158Pr | 157.95198 (64) |
| 200 | ms | -44,730 (600) | 8,062 (4) | B- ? |
|
159Pr | 158.95550 (75) |
| 100 | ms | -41,450 (700) | 8,042 (4) | B- ? |
|
127mPr | 126.93083 (21) |
| 50 | ms | -64,430 (200) | 8,215 (2) | B+ ? |
|
129mPr | 128.925095 (32) |
| 1 | ms | -69,774 (30) | 8,254.4 (2.3) | IT | 100 |
130mPr | 129.923590 (69) |
| 10 | s | -71,175 (64) | 8,263.8 (4.9) | B+ ? |
|
131mPr | 130.920259 (56) |
| 5.7 | s | -74,278 (52) | 8,286.0 (4) | IT | 96.4 12 |
132mPr | 131.919255 (61) |
| 20 | s | -75,213 (57) | 8,291.4 (4.3) | B+ ? |
|
133mPr | 132.916331 (13) |
| 1.1 | us | -77,938 (12) | 8,310.26 (9.4) | IT | 100 |
134mPr | 133.915712 (38) |
| 17 | m | -78,514 (35) | 8,312.8 (2.6) | B+ | 100 |
135mPr | 134.913112 (13) |
| 105 | us | -80,936 (12) | 8,328.93 (8.8) | IT | 100 |
136mPr | 135.912692 (13) |
| 91.7 | ns | -81,327 (12) | 8,329.91 (9) | IT | 100 |
137mPr | 136.910705 (13) |
| 2.66 | us | -83,177 (12) | 8,341.53 (8.6) | 0 |
|
138mPr | 137.910755 (15) |
| 2.12 | h | -83,132 (14) | 8,339.2 (1) | B+ | 100 |
140mPr | 139.9090759 (70) |
| 3.05 | us | -84,695.3 (6.5) | 8,346.58 (4.6) | 0 |
|
142mPr | 141.9100448 (26) |
| 14.6 | m | -83,792.7 (2.5) | 8,336.35 (1.7) | IT | 100 |
144mPr | 143.9133052 (36) |
| 7.2 | m | -80,755.6 (3.3) | 8,311.58 (2.3) | IT~100 |
|
148mPr | 147.922135 (28) |
| 2.01 | m | -72,531 (26) | 8,249.5 (1.8) | B- | 100 |
Data Source: ENSDF March 2005
©Radiochemistry Society 2005