프로메튬 동위 원소
표

| 핵자 수 | Z(p)> 들뜬 에너지 | N(n)> 들뜬 에너지 |   동위 원소 질량 (u)  > 들뜬 에너지 | 반감기 | 붕괴 방식 | 붕괴 생성 동위 원소 | 핵 스핀 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 126Pm | 61 | 65 | 125.95752(54)# | 0.5# s |  |  |  |
| 127Pm | 61 | 66 | 126.95163(64)# | 1# s |  |  | 5/2+# |
| 128Pm | 61 | 67 | 127.94842(43)# | 1.0(3) s | β+ | 128Nd | 6+# |
| 128Pm | 61 | 67 | 127.94842(43)# | 1.0(3) s | p | 127Nd | 6+# |
| 129Pm | 61 | 68 | 128.94316(43)# | 3# s [>200 ns] | β+ | 129Nd | 5/2+# |
| 130Pm | 61 | 69 | 129.94045(32)# | 2.6(2) s | β+ | 130Nd | (5+,6+,4+) |
| 130Pm | 61 | 69 | 129.94045(32)# | 2.6(2) s | β+, p (드묾) | 129Pr | (5+,6+,4+) |
| 131Pm | 61 | 70 | 130.93587(21)# | 6.3(8) s | β+, p | 130Pr | 5/2+# |
| 131Pm | 61 | 70 | 130.93587(21)# | 6.3(8) s | β+ | 131Nd | 5/2+# |
| 132Pm | 61 | 71 | 131.93375(21)# | 6.2(6) s | β+ | 132Nd | (3+) |
| 132Pm | 61 | 71 | 131.93375(21)# | 6.2(6) s | β+, p (5×10−5%) | 131Pr | (3+) |
| 133Pm | 61 | 72 | 132.92978(5) | 15(3) s | β+ | 133Nd | (3/2+) |
| 133mPm | 130.4(10) keV | 130.4(10) keV | 130.4(10) keV | 10# s | β+ | 133Nd | (11/2-) |
| 133mPm | 130.4(10) keV | 130.4(10) keV | 130.4(10) keV | 10# s | IT | 133Pm | (11/2-) |
| 134Pm | 61 | 73 | 133.92835(6) | 22(1) s | β+ | 134Nd | (5+) |
| 134mPm | 0(100)# keV | 0(100)# keV | 0(100)# keV | ~5 s | IT | 134Pm | (2+) |
| 135Pm | 61 | 74 | 134.92488(6) | 49(3) s | β+ | 135Nd | (5/2+,3/2+) |
| 135mPm | 50(100)# keV | 50(100)# keV | 50(100)# keV | 40(3) s | β+ | 135Nd | (11/2-) |
| 136Pm | 61 | 75 | 135.92357(8) | 107(6) s | β+ | 136Nd | (5-) |
| 136mPm | 130(120) keV | 130(120) keV | 130(120) keV | 47(2) s | β+ | 136Nd | (2+) |
| 137Pm | 61 | 76 | 136.920479(14) | 2# min | β+ | 137Nd | 5/2+# |
| 137mPm | 150(50) keV | 150(50) keV | 150(50) keV | 2.4(1) min | β+ | 137Nd | 11/2- |
| 138Pm | 61 | 77 | 137.919548(30) | 10(2) s | β+ | 138Nd | 1+# |
| 138mPm | 30(30) keV | 30(30) keV | 30(30) keV | 3.24(5) min | β+ | 138Nd | 5-# |
| 139Pm | 61 | 78 | 138.916804(14) | 4.15(5) min | β+ | 139Nd | (5/2)+ |
| 139mPm | 188.7(3) keV | 188.7(3) keV | 188.7(3) keV | 180(20) ms | IT (99.83%) | 139Pm | (11/2)- |
| 139mPm | 188.7(3) keV | 188.7(3) keV | 188.7(3) keV | 180(20) ms | β+ (0.17%) | 139Nd | (11/2)- |
| 140Pm | 61 | 79 | 139.91604(4) | 9.2(2) s | β+ | 140Nd | 1+ |
| 140mPm | 420(40) keV | 420(40) keV | 420(40) keV | 5.95(5) min | β+ | 140Nd | 8- |
| 141Pm | 61 | 80 | 140.913555(15) | 20.90(5) min | β+ | 141Nd | 5/2+ |
| 141m1Pm | 628.40(10) keV | 628.40(10) keV | 628.40(10) keV | 630(20) ns |  |  | 11/2- |
| 141m2Pm | 2530.9(5) keV | 2530.9(5) keV | 2530.9(5) keV | >2 µs |  |  |  |
| 142Pm | 61 | 81 | 141.912874(27) | 40.5(5) s | β+ | 142Nd | 1+ |
| 142mPm | 883.17(16) keV | 883.17(16) keV | 883.17(16) keV | 2.0(2) ms | IT | 142Pm | (8)- |
| 143Pm | 61 | 82 | 142.910933(4) | 265(7) d | β+ | 143Nd | 5/2+ |
| 144Pm | 61 | 83 | 143.912591(3) | 363(14) d | β+ | 144Nd | 5- |
| 144m1Pm | 840.90(5) keV | 840.90(5) keV | 840.90(5) keV | 780(200) ns |  |  | (9)+ |
| 144m2Pm | 8595.8(22) keV | 8595.8(22) keV | 8595.8(22) keV | ~2.7 µs |  |  | (27+) |
| 145Pm | 61 | 84 | 144.912749(3) | 17.7(4) a | ε | 145Nd | 5/2+ |
| 145Pm | 61 | 84 | 144.912749(3) | 17.7(4) a | α (2.8×10−7%) | 141Pr | 5/2+ |
| 146Pm | 61 | 85 | 145.914696(5) | 5.53(5) a | ε (66%) | 146Nd | 3- |
| 146Pm | 61 | 85 | 145.914696(5) | 5.53(5) a | β- (34%) | 146Sm | 3- |
| 147Pm | 61 | 86 | 146.9151385(26) | 2.6234(2) a | β- | 147Sm | 7/2+ |
| 148Pm | 61 | 87 | 147.917475(7) | 5.368(2) d | β- | 148Sm | 1- |
| 148mPm | 137.9(3) keV | 137.9(3) keV | 137.9(3) keV | 41.29(11) d | β- (95%) | 148Sm | 5-,6- |
| 148mPm | 137.9(3) keV | 137.9(3) keV | 137.9(3) keV | 41.29(11) d | IT (5%) | 148Pm | 5-,6- |
| 149Pm | 61 | 88 | 148.918334(4) | 53.08(5) h | β- | 149Sm | 7/2+ |
| 149mPm | 240.214(7) keV | 240.214(7) keV | 240.214(7) keV | 35(3) µs |  |  | 11/2- |
| 150Pm | 61 | 89 | 149.920984(22) | 2.68(2) h | β- | 150Sm | (1-) |
| 151Pm | 61 | 90 | 150.921207(6) | 28.40(4) h | β- | 151Sm | 5/2+ |
| 152Pm | 61 | 91 | 151.923497(28) | 4.12(8) min | β- | 152Sm | 1+ |
| 152m1Pm | 140(90) keV | 140(90) keV | 140(90) keV | 7.52(8) min |  |  | 4- |
| 152m2Pm | 250(150)# keV | 250(150)# keV | 250(150)# keV | 13.8(2) min |  |  | (8) |
| 153Pm | 61 | 92 | 152.924117(12) | 5.25(2) min | β- | 153Sm | 5/2- |
| 154Pm | 61 | 93 | 153.92646(5) | 1.73(10) min | β- | 154Sm | (0,1) |
| 154mPm | 120(120) keV | 120(120) keV | 120(120) keV | 2.68(7) min | β- | 154Sm | (3,4) |
| 155Pm | 61 | 94 | 154.92810(3) | 41.5(2) s | β- | 155Sm | (5/2-) |
| 156Pm | 61 | 95 | 155.93106(4) | 26.70(10) s | β- | 156Sm | 4- |
| 157Pm | 61 | 96 | 156.93304(12) | 10.56(10) s | β- | 157Sm | (5/2-) |
| 158Pm | 61 | 97 | 157.93656(14) | 4.8(5) s | β- | 158Sm |  |
| 159Pm | 61 | 98 | 158.93897(21)# | 1.47(15) s | β- | 159Sm | 5/2-# |
| 160Pm | 61 | 99 | 159.94299(32)# | 2# s | β- | 160Sm |  |
| 161Pm | 61 | 100 | 160.94586(54)# | 700# ms | β- | 161Sm | 5/2-# |
| 162Pm | 61 | 101 | 161.95029(75)# | 500# ms | β- | 162Sm |  |
| 163Pm | 61 | 102 | 162.95368(86)# | 200# ms | β- | 163Sm | 5/2-# |
↑  약어:
ε: 전자 포획
IT: 이성질핵 전이
↑  안정 동위 원소는 굵은 글씨로 표기, 우주의 나이보다 반감기가 긴 동위 원소는 굵은 흘림체로 표기
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