氪（原子量：83798 2）共有 40 個同位素，其中有 5 個同位素是穩定的。 圖表 69Kr styletextalignright 36 styletextalignright 33 6896518 43 32 10 ms 69Br 52 70Kr styletextalignright 36 styletextalignright 34 6995526 41 52 17 ms 70Br 0 rowspan271Kr rowspan2 styletextalignright 36 rowspan2 styletextalignright 35 rowspan27094963 70 rowspan2100 3 ms 948 71Br rowspan252 rowspan2 rowspan2 52 70Se 72Kr styletextalignright 36 styletextalignright 36 71942092 9 1716 18 s 72Br 0 rowspan273Kr rowspan2 styletextalignright 36 rowspan2 styletextalignright 37 rowspan272939289 7 rowspan2286 6 s 9932 73Br rowspan232 rowspan2 rowspan2 p 68 72Se styletextindent1em 73mKr colspan3 styletextindent2em 43366 12 keV 107 10 ns 92 74Kr styletextalignright 36 styletextalignright 38 739330844 22 1150 11 min 74Br 0 75Kr styletextalignright 36 styletextalignright 39 74930946 9 429 17 min 75Br 52 76Kr styletextalignright 36 styletextalignright 40 75925910 4 148 1 h 76Br 0 77Kr styletextalignright 36 styletextalignright 41 769246700 21 744 6 min 77Br 52 78Kr styletextalignright 36 styletextalignright 42 779203648 12 aligncenter92 y 雙電子捕獲 78Se 0 000355 3 79Kr styletextalignright 36 styletextalignright 43 78920082 4 3504 10 h 79Br 12 styletextindent1em 79mKr colspan3 styletextindent2em 12977 5 keV 50 3 s 72 80Kr styletextalignright 36 styletextalignright 44 799163790 16 colspan3 aligncenter 0 002286 10 81Kr 用於測量地下水的年齡 styletextalignright 36 styletextalignright 45 809165920 21 229 11105 a 81Br 72 trace rowspan2 styletextindent1em 81mKr rowspan2 colspan3 styletextindent2em 19062 4 keV rowspan21310 3 s IT 99975 81Kr rowspan212 rowspan2 rowspan2 025 81Br 82Kr styletextalignright 36 styletextalignright 46 819134836 19 colspan3 aligncenter 0 011593 31 83Kr 裂變產物 styletextalignright 36 styletextalignright 47 82914136 3 colspan3 aligncenter 92 011500 19 styletextindent1em 83m1Kr colspan3 styletextindent2em 94053 8 keV 1544 11 ns 72 styletextindent1em 83m2Kr colspan3 styletextindent2em 415569 10 keV 183 2 h IT 83Kr 12 styletextalignright 36 styletextalignright 48 83911507 3 colspan3 aligncenter 0 056987 15 styletextindent1em 84mKr colspan3 styletextindent2em 323602 18 keV 189 4 µs 8 styletextalignright 36 styletextalignright 49 849125273 21 10776 3 a 85Rb 92 trace rowspan2 styletextindent1em 85m1Kr rowspan2 colspan3 styletextindent2em 304871 20 keV rowspan24480 8 h 786 85Rb rowspan212 rowspan2 rowspan2 IT 214 85Kr styletextindent1em 85m2Kr colspan3 styletextindent2em 19918 13 keV 16 7 µs 12 104 µs 172 86Kr 以前用於定義米的長度 styletextalignright 36 styletextalignright 50 8591061073 11 colspan3 aligncenter 觀測上穩定被認為會雙 β 衰變成 86Sr 0 017279 41 87Kr styletextalignright 36 styletextalignright 51 8691335486 29 763 5 min 87Rb 52 88Kr styletextalignright 36 styletextalignright 52 87914447 14 284 3 h 88Rb 0 89Kr styletextalignright 36 styletextalignright 53 8891763 6 315 4 min 89Rb 32 90Kr styletextalignright 36 styletextalignright 54 89919517 20 3232 9 s 90mRb 0 91Kr styletextalignright 36 styletextalignright 55 9092345 6 857 4 s 91Rb 52 rowspan292Kr rowspan2 styletextalignright 36 rowspan2 styletextalignright 56 rowspan291926156 13 rowspan21840 8 s 9996 92Rb rowspan20 rowspan2 rowspan2 033 91Rb rowspan293Kr rowspan2 styletextalignright 36 rowspan2 styletextalignright 57 rowspan29293127 11 rowspan21286 10 s 9805 93Rb rowspan212 rowspan2 rowspan2 195 92Rb rowspan294Kr rowspan2 styletextalignright 36 rowspan2 styletextalignright 58 rowspan29393436 32 rowspan2210 4 ms 943 94Rb rowspan20 rowspan2 rowspan2 57 93Rb 95Kr styletextalignright 36 styletextalignright 59 9493984 43 114 3 ms 95Rb 12 96Kr styletextalignright 36 styletextalignright 60 9594307 54 80 7 ms 96Rb 0 rowspan297Kr rowspan2 styletextalignright 36 rowspan2 styletextalignright 61 rowspan29694856 54 rowspan263 4 ms 97Rb rowspan232 rowspan2 rowspan2 n 96Rb 98Kr styletextalignright 36 styletextalignright 62 9795191 64 46 8 ms 0 99Kr styletextalignright 36 styletextalignright 63 9895760 64 40 11 ms 32 100Kr styletextalignright 36 styletextalignright 64 9996114 54 10 ms 300 ns 0 rowspan3 101Kr rowspan3 styletextalignright 36 rowspan3 styletextalignright 65 rowspan3 unknown rowspan3 635 ns 2 99Rb rowspan3 unknown rowspan3 rowspan3 100Rb 101Rb 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 Kr Category 氪的同位素