Table
| nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | decay mode(s) |
daughter isotope(s) |
nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
|---|---|---|---|---|---|---|---|---|---|
| excitation energy | |||||||||
| 121Pr | 59 | 62 | 120.95536(75)# | 600(300) ms | p | 120Ce | (3/2-) | ||
| β+ (rare) | 121Ce | ||||||||
| β+, p (rare) | 120La | ||||||||
| 122Pr | 59 | 63 | 121.95181(54)# | 500# ms | β+ | 122Ce | |||
| 123Pr | 59 | 64 | 122.94596(64)# | 800# ms | β+ | 123Ce | 3/2+# | ||
| 124Pr | 59 | 65 | 123.94296(64)# | 1.2(2) s | β+ | 124Ce | |||
| β+, p (rare) | 123La | ||||||||
| 125Pr | 59 | 66 | 124.93783(43)# | 3.3(7) s | β+ | 125Ce | 3/2+# | ||
| β+, p (rare) | 124La | ||||||||
| 126Pr | 59 | 67 | 125.93531(21)# | 3.12(18) s | β+ | 126Ce | (4,5,6) | ||
| β+, p (rare) | 125La | ||||||||
| 127Pr | 59 | 68 | 126.93083(21)# | 4.2(3) s | β+ | 127Ce | 3/2+# | ||
| 127mPr | 600(200)# keV | 50# ms | 11/2- | ||||||
| 128Pr | 59 | 69 | 127.92879(3) | 2.84(9) s | β+ | 128Ce | (3+) | ||
| β+, p (rare) | 127La | ||||||||
| 129Pr | 59 | 70 | 128.92510(3) | 32(3) s | β+ | 129Ce | (11/2-) | ||
| 129mPr | 382.7(5) keV | 1# ms | β+ | 129Ce | (11/2-) | ||||
| 130Pr | 59 | 71 | 129.92359(7) | 40.0(4) s | β+ | 130Ce | (6,7)(+#) | ||
| 130mPr | 100(100)# keV | 10# s | 2+# | ||||||
| 131Pr | 59 | 72 | 130.92026(6) | 1.50(3) min | β+ | 131Ce | (3/2+) | ||
| 131mPr | 152.4(2) keV | 5.7(2) s | IT (96.4%) | 131Pr | (11/2-) | ||||
| β+ (3.59%) | 131Ce | ||||||||
| 132Pr | 59 | 73 | 131.91926(6) | 1.49(11) min | β+ | 132Ce | (2+) | ||
| 132mPr | 0(100)# keV | 20# s | β+ | 132Ce | (5+) | ||||
| 133Pr | 59 | 74 | 132.916331(13) | 6.5(3) min | β+ | 133Ce | (3/2+) | ||
| 133mPr | 192.05(14) keV | 1.1(2) µs | (11/2-) | ||||||
| 134Pr | 59 | 75 | 133.91571(4) | ~11 min | β+ | 134Ce | (5-) | ||
| 134mPr | 0(100)# keV | 17(2) min | β+ | 134Ce | 2- | ||||
| 135Pr | 59 | 76 | 134.913112(13) | 24(2) min | β+ | 135Ce | 3/2(+) | ||
| 135mPr | 358.06(6) keV | 105(10) µs | (11/2-) | ||||||
| 136Pr | 59 | 77 | 135.912692(13) | 13.1(1) min | β+ | 136Ce | 2+ | ||
| 137Pr | 59 | 78 | 136.910705(13) | 1.28(3) h | β+ | 137Ce | 5/2+ | ||
| 137mPr | 561.22(23) keV | 2.66(7) µs | 11/2- | ||||||
| 138Pr | 59 | 79 | 137.910755(15) | 1.45(5) min | β+ | 138Ce | 1+ | ||
| 138mPr | 348(23) keV | 2.12(4) h | β+ | 138Ce | 7- | ||||
| 139Pr | 59 | 80 | 138.908938(8) | 4.41(4) h | β+ | 139Ce | 5/2+ | ||
| 140Pr | 59 | 81 | 139.909076(7) | 3.39(1) min | β+ | 140Ce | 1+ | ||
| 140m1Pr | 127.5(3) keV | 0.35(2) µs | 5+ | ||||||
| 140m2Pr | 763.3(7) keV | 3.05(20) µs | (8)- | ||||||
| 141Pr | 59 | 82 | 140.9076528(26) | Stable | 5/2+ | 1.0000 | |||
| 142Pr | 59 | 83 | 141.9100448(26) | 19.12(4) h | β- (99.98%) | 142Nd | 2- | ||
| EC (.0164%) | 142Ce | ||||||||
| 142mPr | 3.694(3) keV | 14.6(5) min | IT | 142Pr | 5- | ||||
| 143Pr | 59 | 84 | 142.9108169(28) | 13.57(2) d | β- | 143Nd | 7/2+ | ||
| 144Pr | 59 | 85 | 143.913305(4) | 17.28(5) min | β- | 144Nd | 0- | ||
| 144mPr | 59.03(3) keV | 7.2(3) min | IT (99.93%) | 144Pr | 3- | ||||
| β- (.07%) | 144Nd | ||||||||
| 145Pr | 59 | 86 | 144.914512(8) | 5.984(10) h | β- | 145Nd | 7/2+ | ||
| 146Pr | 59 | 87 | 145.91764(7) | 24.15(18) min | β- | 146Nd | (2)- | ||
| 147Pr | 59 | 88 | 146.918996(25) | 13.4(4) min | β- | 147Nd | (3/2+) | ||
| 148Pr | 59 | 89 | 147.922135(28) | 2.29(2) min | β- | 148Nd | 1- | ||
| 148mPr | 50(30)# keV | 2.01(7) min | β- | 148Nd | (4) | ||||
| 149Pr | 59 | 90 | 148.92372(9) | 2.26(7) min | β- | 149Nd | (5/2+) | ||
| 150Pr | 59 | 91 | 149.926673(28) | 6.19(16) s | β- | 150Nd | (1)- | ||
| 151Pr | 59 | 92 | 150.928319(25) | 18.90(7) s | β- | 151Nd | (3/2)(-#) | ||
| 152Pr | 59 | 93 | 151.93150(13) | 3.63(12) s | β- | 152Nd | 4+ | ||
| 153Pr | 59 | 94 | 152.93384(11) | 4.28(11) s | β- | 153Nd | 5/2-# | ||
| 154Pr | 59 | 95 | 153.93752(16) | 2.3(1) s | β- | 154Nd | (3+,2+) | ||
| 155Pr | 59 | 96 | 154.94012(32)# | 1# s | β- | 155Nd | 5/2-# | ||
| 156Pr | 59 | 97 | 155.94427(43)# | 500# ms | β- | 156Nd | |||
| 157Pr | 59 | 98 | 156.94743(43)# | 300# ms | β- | 157Nd | 5/2-# | ||
| 158Pr | 59 | 99 | 157.95198(64)# | 200# ms | β- | 158Nd | |||
| 159Pr | 59 | 100 | 158.95550(75)# | 100# ms | β- | 159Nd | 5/2-# | ||
Read more about this topic: Isotopes Of Praseodymium
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