鉭（原子質量單位：18094788 2）的同位素，有 1 個是穩定的，另一個為天然存在的核異構體，理論上不穩定，但是半衰期只有下界。 圖表 styletextalignright 73 styletextalignright 82 15497459 54 13 4 µs 12 43 µs 112 rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 83 rowspan215597230 43 rowspan2144 24 ms 958 156Hf rowspan22 rowspan2 rowspan2 42 155Hf styletextindent1em colspan3 styletextindent2em 102 7 keV 036 4 s 155Hf 9 rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 84 rowspan215696819 22 rowspan2101 4 ms 91 153Lu rowspan212 rowspan2 rowspan2 9 157Hf styletextindent1em colspan3 styletextindent2em 22 5 keV 43 1 ms 112 styletextindent1em colspan3 styletextindent2em 1593 9 keV 17 1 ms 153Lu 252 rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 85 rowspan215796670 22 rowspan249 8 ms 96 154Lu rowspan22 rowspan2 rowspan2 4 158Hf rowspan3 styletextindent1em rowspan3 colspan3 styletextindent2em 141 9 keV rowspan3360 8 ms 93 154Lu rowspan39 rowspan3 rowspan3 IT 158Ta 158Hf rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 86 rowspan2158963018 22 rowspan2104 9 s 66 159Hf rowspan212 rowspan2 rowspan2 34 155Lu rowspan2 styletextindent1em rowspan2 colspan3 styletextindent2em 64 5 keV rowspan2514 9 ms 56 155Lu rowspan2112 rowspan2 rowspan2 44 159Hf rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 87 rowspan215996149 10 rowspan2170 20 s 156Lu rowspan22 rowspan2 rowspan2 160Hf rowspan2 styletextindent1em rowspan2 colspan3 styletextindent2em 310 90 keV rowspan2155 4 s 66 160Hf rowspan29 rowspan2 rowspan2 34 156Lu rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 88 rowspan216095842 6 rowspan23 s 95 161Hf rowspan212 rowspan2 rowspan2 5 157Lu styletextindent1em colspan3 styletextindent2em 50 50 keV 289 12 s 112 rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 89 rowspan216195729 6 rowspan2357 12 s 9992 162Hf rowspan23 rowspan2 rowspan2 073 158Lu rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 90 rowspan216295433 4 rowspan2106 18 s 998 163Hf rowspan212 rowspan2 rowspan2 2 159Lu styletextalignright 73 styletextalignright 91 16395353 3 142 3 s 164Hf 3 styletextalignright 73 styletextalignright 92 164950773 19 310 15 s 165Hf 52 styletextindent1em colspan3 styletextindent2em 60 30 keV 92 styletextalignright 73 styletextalignright 93 16595051 3 344 5 s 166Hf 2 styletextalignright 73 styletextalignright 94 16694809 3 133 7 min 167Hf 32 styletextalignright 73 styletextalignright 95 16794805 3 20 1 min 168Hf 23 styletextalignright 73 styletextalignright 96 16894601 3 49 4 min 169Hf 52 styletextalignright 73 styletextalignright 97 16994618 3 676 6 min 170Hf 3 styletextalignright 73 styletextalignright 98 17094448 3 233 3 min 171Hf 52 styletextalignright 73 styletextalignright 99 17194490 3 368 3 min 172Hf 3 styletextalignright 73 styletextalignright 100 17294375 3 314 13 h 173Hf 52 styletextalignright 73 styletextalignright 101 17394445 3 114 8 h 174Hf 3 styletextalignright 73 styletextalignright 102 17494374 3 105 2 h 175Hf 72 styletextalignright 73 styletextalignright 103 17594486 3 809 5 h 176Hf 1 styletextindent1em colspan3 styletextindent2em 1030 10 keV 11 1 ms IT 176Ta styletextindent1em colspan3 styletextindent2em 13726 11X keV 38 4 µs 14 styletextindent1em colspan3 styletextindent2em 2820 50 keV 097 7 ms 20 styletextalignright 73 styletextalignright 104 176944472 4 5656 6 h 177Hf 72 styletextindent1em colspan3 styletextindent2em 7336 15 keV 410 7 ns 92 styletextindent1em colspan3 styletextindent2em 18615 6 keV 362 10 µs 52 styletextindent1em colspan3 styletextindent2em 135501 19 keV 531 25 µs 212 styletextindent1em colspan3 styletextindent2em 46563 5 keV 133 4 µs 492 styletextalignright 73 styletextalignright 105 177945778 16 931 3 min 178Hf 1 styletextindent1em colspan3 styletextindent2em 100 50 keV 236 8 h 178Hf 7 styletextindent1em colspan3 styletextindent2em 1570 50 keV 59 3 ms 15 styletextindent1em colspan3 styletextindent2em 3000 50 keV 290 12 ms 21 styletextalignright 73 styletextalignright 106 1789459295 23 182 3 a 179Hf 72 styletextindent1em colspan3 styletextindent2em 307 1 keV 142 8 µs 92 styletextindent1em colspan3 styletextindent2em 52023 18 keV 335 45 ns 12 styletextindent1em colspan3 styletextindent2em 125261 23 keV 322 16 ns 212 styletextindent1em colspan3 styletextindent2em 13173 4 keV 90 2 ms IT 179Ta 252 styletextindent1em colspan3 styletextindent2em 13279 4 keV 16 4 µs 232 styletextindent1em colspan3 styletextindent2em 26393 5 keV 541 17 ms 372 rowspan2 rowspan2 styletextalignright 73 rowspan2 styletextalignright 107 rowspan21799474648 24 rowspan28152 6 h 86 180Hf rowspan21 rowspan2 rowspan2 14 180W styletextindent1em colspan3 styletextindent2em 771 8 keV colspan3 aligncenter 觀測上穩定 Only known observationally stable nuclear isomer believed to decay by isomeric transition to 180Ta decay to 180W or electron capture to 180Hf with a halflife over 121015 years 9 12 2104 styletextindent1em colspan3 styletextindent2em 145240 18 keV 312 14 µs 15 styletextindent1em colspan3 styletextindent2em 36790 11 keV 20 5 µs 22 styletextindent1em colspan3 styletextindent2em 41710X keV 17 5 µs 232425 styletextalignright 73 styletextalignright 108 1809479958 20 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 177Lu 72 099988 2 styletextindent1em colspan3 styletextindent2em 6238 20 keV 605 12 µs 92 styletextindent1em colspan3 styletextindent2em 61521 3 keV 18 1 µs 12 styletextindent1em colspan3 styletextindent2em 1485 3 keV 25 2 µs 212 styletextindent1em colspan3 styletextindent2em 2230 3 keV 210 20 µs 292 styletextalignright 73 styletextalignright 109 1819501518 19 11443 3 d 182W 3 styletextindent1em colspan3 styletextindent2em 16263 3 keV 283 3 ms IT 182Ta 5 styletextindent1em colspan3 styletextindent2em 519572 18 keV 1584 10 min 10 styletextalignright 73 styletextalignright 110 1829513726 19 51 1 d 183W 72 styletextindent1em colspan3 styletextindent2em 73174 12 keV 107 11 ns 92 styletextalignright 73 styletextalignright 111 183954008 28 87 1 h 184W 5 styletextalignright 73 styletextalignright 112 184955559 15 494 15 min 185W 72 styletextindent1em colspan3 styletextindent2em 1308 29 keV 1 ms 212 styletextalignright 73 styletextalignright 113 18595855 6 105 3 min 186W 23 styletextindent1em colspan3 styletextindent2em 154 5 min styletextalignright 73 styletextalignright 114 18696053 21 2 min 300 ns 187W 72 styletextalignright 73 styletextalignright 115 18796370 21 20 s 300 ns 188W styletextalignright 73 styletextalignright 116 18896583 32 3 s 300 ns 72 styletextalignright 73 styletextalignright 117 18996923 43 03 s 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 Isotopic compositions and standard atomic masses from Atomic weights of the elements Review 2000 IUPAC Technical Report Pure Appl Chem Vol 75 No 6 pp 683800 2003 and Atomic Weights Revised 2005 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 Ta Category 鉭