鐠（原子量：14090766 1）的同位素，其中有 1 個同位素是穩定的。 圖表 rowspan3121Pr rowspan3 styletextalignright 59 rowspan3 styletextalignright 62 rowspan312095536 75 rowspan3600 300 ms 120Ce rowspan332 rowspan3 （不常見） 121Ce （不常見） 120La 122Pr styletextalignright 59 styletextalignright 63 12195181 54 500 ms 122Ce 123Pr styletextalignright 59 styletextalignright 64 12294596 64 800 ms 123Ce 32 rowspan2124Pr rowspan2 styletextalignright 59 rowspan2 styletextalignright 65 rowspan212394296 64 rowspan212 2 s 124Ce rowspan2 rowspan2 （不常見） 123La rowspan2125Pr rowspan2 styletextalignright 59 rowspan2 styletextalignright 66 rowspan212493783 43 rowspan233 7 s 125Ce rowspan232 rowspan2 （不常見） 124La rowspan2126Pr rowspan2 styletextalignright 59 rowspan2 styletextalignright 67 rowspan212593531 21 rowspan2312 18 s 126Ce rowspan2456 rowspan2 （不常見） 125La 127Pr styletextalignright 59 styletextalignright 68 12693083 21 42 3 s 127Ce 32 styletextindent1em 127mPr colspan3 styletextindent2em 600 200 keV 50 ms 112 rowspan2128Pr rowspan2 styletextalignright 59 rowspan2 styletextalignright 69 rowspan212792879 3 rowspan2284 9 s 128Ce rowspan23 rowspan2 （不常見） 127La 129Pr styletextalignright 59 styletextalignright 70 12892510 3 32 3 s 129Ce 112 styletextindent1em 129mPr colspan3 styletextindent2em 3827 5 keV 1 ms 129Ce 112 130Pr styletextalignright 59 styletextalignright 71 12992359 7 400 4 s 130Ce 67 styletextindent1em 130mPr colspan3 styletextindent2em 100 100 keV 10 s 2 131Pr styletextalignright 59 styletextalignright 72 13092026 6 150 3 min 131Ce 32 rowspan2 styletextindent1em 131mPr rowspan2 colspan3 styletextindent2em 1524 2 keV rowspan257 2 s IT 964 131Pr rowspan2112 rowspan2 359 131Ce 132Pr styletextalignright 59 styletextalignright 73 13191926 6 149 11 min 132Ce 2 styletextindent1em 132mPr colspan3 styletextindent2em 0 100 keV 20 s 132Ce 5 133Pr styletextalignright 59 styletextalignright 74 132916331 13 65 3 min 133Ce 32 styletextindent1em 133mPr colspan3 styletextindent2em 19205 14 keV 11 2 µs 112 134Pr styletextalignright 59 styletextalignright 75 13391571 4 11 min 134Ce 5 styletextindent1em 134mPr colspan3 styletextindent2em 0 100 keV 17 2 min 134Ce 2 135Pr styletextalignright 59 styletextalignright 76 134913112 13 24 2 min 135Ce 32 styletextindent1em 135mPr colspan3 styletextindent2em 35806 6 keV 105 10 µs 112 136Pr styletextalignright 59 styletextalignright 77 135912692 13 131 1 min 136Ce 2 137Pr styletextalignright 59 styletextalignright 78 136910705 13 128 3 h 137Ce 52 styletextindent1em 137mPr colspan3 styletextindent2em 56122 23 keV 266 7 µs 112 138Pr styletextalignright 59 styletextalignright 79 137910755 15 145 5 min 138Ce 1 styletextindent1em 138mPr colspan3 styletextindent2em 348 23 keV 212 4 h 138Ce 7 139Pr styletextalignright 59 styletextalignright 80 138908938 8 441 4 h 139Ce 52 140Pr styletextalignright 59 styletextalignright 81 139909076 7 339 1 min 140Ce 1 styletextindent1em 140m1Pr colspan3 styletextindent2em 1275 3 keV 035 2 µs 5 styletextindent1em 140m2Pr colspan3 styletextindent2em 7633 7 keV 305 20 µs 8 141Pr 裂變產物 styletextalignright 59 styletextalignright 82 1409076528 26 colspan3 aligncenter 52 10000 rowspan2142Pr rowspan2 styletextalignright 59 rowspan2 styletextalignright 83 rowspan21419100448 26 rowspan21912 4 h 9998 142Nd rowspan22 rowspan2 0164 142Ce styletextindent1em 142mPr colspan3 styletextindent2em 3694 3 keV 146 5 min IT 142Pr 5 143Pr styletextalignright 59 styletextalignright 84 1429108169 28 1357 2 d 143Nd 72 144Pr styletextalignright 59 styletextalignright 85 143913305 4 1728 5 min 144Nd 0 rowspan2 styletextindent1em 144mPr rowspan2 colspan3 styletextindent2em 5903 3 keV rowspan272 3 min IT 9993 144Pr rowspan23 rowspan2 07 144Nd 145Pr styletextalignright 59 styletextalignright 86 144914512 8 5984 10 h 145Nd 72 146Pr styletextalignright 59 styletextalignright 87 14591764 7 2415 18 min 146Nd 2 147Pr styletextalignright 59 styletextalignright 88 146918996 25 134 4 min 147Nd 32 148Pr styletextalignright 59 styletextalignright 89 147922135 28 229 2 min 148Nd 1 styletextindent1em 148mPr colspan3 styletextindent2em 50 30 keV 201 7 min 148Nd 4 149Pr styletextalignright 59 styletextalignright 90 14892372 9 226 7 min 149Nd 52 150Pr styletextalignright 59 styletextalignright 91 149926673 28 619 16 s 150Nd 1 151Pr styletextalignright 59 styletextalignright 92 150928319 25 1890 7 s 151Nd 32 152Pr styletextalignright 59 styletextalignright 93 15193150 13 363 12 s 152Nd 4 153Pr styletextalignright 59 styletextalignright 94 15293384 11 428 11 s 153Nd 52 154Pr styletextalignright 59 styletextalignright 95 15393752 16 23 1 s 154Nd 32 155Pr styletextalignright 59 styletextalignright 96 15494012 32 1 s 300 ns 155Nd 52 156Pr styletextalignright 59 styletextalignright 97 15594427 43 500 ms 300 ns 156Nd 157Pr styletextalignright 59 styletextalignright 98 15694743 43 300 ms 157Nd 52 158Pr styletextalignright 59 styletextalignright 99 15795198 64 200 ms 158Nd 159Pr styletextalignright 59 styletextalignright 100 15895550 75 100 ms 159Nd 52 參考文獻 Isotope masses from Ame2003 Atomic Mass Evaluation by G Audi AH Wapstra C Thibault J Blachot and O Bersillon in Nuclear Physics A729 2003 Halflife spin and isomer data selected from these sources Editing notes on this articles talk page Audi Bersillon Blachot Wapstra The Nubase2003 evaluation of nuclear and decay properties Nuc Phys A 729 pp 3128 2003 National Nuclear Data Center Brookhaven National Laboratory Information extracted from the NuDat 21 database retrieved Sept 2005 David R Lide ed Norman E Holden in CRC Handbook of Chemistry and Physics 85th Edition online version CRC Press Boca Raton Florida 2005 Section 11 Table of the Isotopes Pr Category 鐠