鉺（原子量：167259 3）的同位素，其中有 6 個同位素是在觀測上穩定的。 圖表 142Er styletextalignright 68 styletextalignright 74 14197002 54 10 μs p 141Ho 0 rowspan2 143Er styletextalignright rowspan2 68 styletextalignright rowspan2 75 rowspan2 14296655 43 rowspan2 200 ms β 143Ho rowspan292 rowspan2 rowspan2 β p 142Dy 144Er styletextalignright 68 styletextalignright 76 14396038 43 400 ms 200 ns 144Ho 0 rowspan2145Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 77 rowspan214495739 43 rowspan2900 300 ms 145Ho rowspan212 rowspan2 rowspan2 （不常見） 144Dy rowspan2146Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 78 rowspan214595200 32 rowspan217 6 s 146Ho rowspan20 rowspan2 rowspan2 145Dy rowspan2147Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 79 rowspan214694949 32 rowspan225 s 147Ho rowspan212 rowspan2 rowspan2 146Dy styletextindent1em 147mEr colspan3 styletextindent2em 100 50 keV 25 2 s 147Ho 112 rowspan2148Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 80 rowspan214794455 21 rowspan246 2 s 9985 148Ho rowspan20 rowspan2 rowspan2 15 147Dy rowspan2149Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 81 rowspan214894231 3 rowspan24 2 s 93 149Ho rowspan212 rowspan2 rowspan2 7 148Dy rowspan3 styletextindent1em 149m1Er rowspan3 colspan3 styletextindent2em 7418 2 keV rowspan389 2 s 965 149Ho rowspan3112 rowspan3 rowspan3 IT 35 149Er 18 148Dy styletextindent1em 149m2Er colspan3 styletextindent2em 26111 3 keV 061 8 µs 192 styletextindent1em 149m3Er colspan3 styletextindent2em 32427X keV 48 1 µs 272 150Er styletextalignright 68 styletextalignright 82 149937914 18 185 7 s 150Ho 0 151Er styletextalignright 68 styletextalignright 83 150937449 18 235 13 s 151Ho 72 rowspan2 styletextindent1em 151m1Er rowspan2 colspan3 styletextindent2em 25855 6 keV rowspan2580 20 ms IT 953 151Er rowspan2272 rowspan2 rowspan2 47 151Ho styletextindent1em 151m2Er colspan3 styletextindent2em 10286X keV 042 5 µs 672692712 rowspan2152Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 84 rowspan2151935050 11 rowspan2103 1 s 90 148Dy rowspan20 rowspan2 rowspan2 10 152Ho rowspan2153Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 85 rowspan2152935063 9 rowspan2371 2 s 53 149Dy rowspan272 rowspan2 rowspan2 47 153Ho rowspan2154Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 86 rowspan2153932783 6 rowspan2373 9 min 9953 154Ho rowspan20 rowspan2 rowspan2 47 150Dy rowspan2155Er rowspan2 styletextalignright 68 rowspan2 styletextalignright 87 rowspan2154933209 7 rowspan253 3 min 9998 155Ho rowspan272 rowspan2 rowspan2 022 151Dy 156Er styletextalignright 68 styletextalignright 88 155931065 26 195 10 min 156Ho 0 157Er styletextalignright 68 styletextalignright 89 15693192 3 1865 10 min 157Ho 32 styletextindent1em 157mEr colspan3 styletextindent2em 1554 3 keV 76 6 ms IT 157Er 92 158Er styletextalignright 68 styletextalignright 90 157929893 27 229 6 h 158Ho 0 159Er styletextalignright 68 styletextalignright 91 158930684 5 36 1 min 159Ho 32 styletextindent1em 159m1Er colspan3 styletextindent2em 182602 24 keV 337 14 ns 92 styletextindent1em 159m2Er colspan3 styletextindent2em 42905 3 keV 590 60 ns 112 160Er styletextalignright 68 styletextalignright 92 159929083 26 2858 9 h 160Ho 0 161Er styletextalignright 68 styletextalignright 93 160929995 10 321 3 h 161Ho 32 styletextindent1em 161mEr colspan3 styletextindent2em 39644 4 keV 75 7 µs 112 162Er styletextalignright 68 styletextalignright 94 161928778 4 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 158Dy or to 162Dy with a halflife over 1401012 years 0 000139 5 163Er styletextalignright 68 styletextalignright 95 162930033 6 750 4 min 163Ho 52 styletextindent1em 163mEr colspan3 styletextindent2em 4455 6 keV 580 100 ns 112 164Er styletextalignright 68 styletextalignright 96 163929200 3 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 160Dy or to 164Dy 0 001601 3 165Er styletextalignright 68 styletextalignright 97 164930726 3 1036 4 h 165Ho 52 166Er styletextalignright 68 styletextalignright 98 1659302931 27 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 162Dy 0 033503 36 167Er styletextalignright 68 styletextalignright 99 1669320482 27 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 163Dy 72 022869 9 styletextindent1em 167mEr colspan3 styletextindent2em 207801 5 keV 2269 6 s IT 167Er 12 168Er styletextalignright 68 styletextalignright 100 1679323702 27 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 164Dy 0 026978 18 169Er styletextalignright 68 styletextalignright 101 1689345904 27 9392 18 d 169Tm 12 170Er styletextalignright 68 styletextalignright 102 1699354643 30 colspan3 aligncenter 觀測上穩定 Believed to undergo decay to 166Dy or to 170Yb with a halflife over 3201015 years 0 014910 36 171Er styletextalignright 68 styletextalignright 103 1709380298 30 7516 2 h 171Tm 52 styletextindent1em 171mEr colspan3 styletextindent2em 1986 1 keV 210 10 ns 12 172Er styletextalignright 68 styletextalignright 104 171939356 5 493 3 h 172Tm 0 173Er styletextalignright 68 styletextalignright 105 17294240 21 1434 17 min 173Tm 72 174Er styletextalignright 68 styletextalignright 106 17394423 32 32 2 min 174Tm 0 175Er styletextalignright 68 styletextalignright 107 17494777 43 12 3 min 175Tm 92 176Er styletextalignright 68 styletextalignright 108 17595008 43 20 s 176Tm 0 177Er styletextalignright 68 styletextalignright 109 17695405 54 3 s 177Tm 12 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 Er Category 鉺