氯（原子質量單位：35453 2）共有 26 個同位素，其中有 2 個是穩定的。 圖表 28Cl styletextalignright 17 styletextalignright 11 2802851 54 27S 1 29Cl styletextalignright 17 styletextalignright 12 2901411 21 20 ns p 28S 32 30Cl styletextalignright 17 styletextalignright 13 3000477 21 30 ns p 29S 3 rowspan231Cl rowspan2 styletextalignright 17 rowspan2 styletextalignright 14 rowspan23099241 5 rowspan2150 25 ms β 993 31S rowspan232 rowspan2 rowspan2 β p 7 30P rowspan332Cl rowspan3 styletextalignright 17 rowspan3 styletextalignright 15 rowspan331985690 7 rowspan3298 1 ms β 9992 32S rowspan31 rowspan3 rowspan3 β α 054 28Si β p 026 31P 33Cl styletextalignright 17 styletextalignright 16 329774519 5 2511 3 s β 33S 32 34Cl styletextalignright 17 styletextalignright 17 3397376282 19 15264 14 s β 34S 0 rowspan2 styletextindent1em 34mCl rowspan2 colspan3 styletextindent2em 14636 3 keV rowspan23200 4 min β 554 34S rowspan23 rowspan2 rowspan2 IT 446 34Cl styletextalignright 17 styletextalignright 18 3496885268 4 colspan3 aligncenter 32 07576 10 075644075923 rowspan2Used in 放射性定年法 water rowspan2 styletextalignright 17 rowspan2 styletextalignright 19 rowspan23596830698 8 rowspan2301 2105 y β 981 36Ar rowspan22 rowspan2 痕量 rowspan2 約為 7x1013 ε 19 36S styletextalignright 17 styletextalignright 20 3696590259 5 colspan3 aligncenter 穩定 32 02424 10 024077024356 38Cl styletextalignright 17 styletextalignright 21 3796801043 10 3724 5 min β 38Ar 2 styletextindent1em 38mCl colspan3 styletextindent2em 671361 8 keV 715 3 ms IT 38Cl 5 39Cl styletextalignright 17 styletextalignright 22 389680082 19 556 2 min β 39Ar 32 40Cl styletextalignright 17 styletextalignright 23 3997042 3 135 2 min β 40Ar 2 41Cl styletextalignright 17 styletextalignright 24 4097068 7 384 8 s β 41Ar 1232 42Cl styletextalignright 17 styletextalignright 25 4197325 15 68 3 s β 42Ar rowspan243Cl rowspan2 styletextalignright 17 rowspan2 styletextalignright 26 rowspan24297405 17 rowspan2307 7 s β 999 43Ar rowspan232 rowspan2 rowspan2 β n 1 42Ar rowspan244Cl rowspan2 styletextalignright 17 rowspan2 styletextalignright 27 rowspan24397828 12 rowspan2056 11 s β 92 44Ar rowspan2 rowspan2 rowspan2 β n 8 43Ar rowspan245Cl rowspan2 styletextalignright 17 rowspan2 styletextalignright 28 rowspan24498029 13 rowspan2400 40 ms β 76 45Ar rowspan232 rowspan2 rowspan2 β n 24 44Ar rowspan246Cl rowspan2 styletextalignright 17 rowspan2 styletextalignright 29 rowspan24598421 77 rowspan2232 2 ms β n 60 45Ar rowspan2 rowspan2 rowspan2 β 40 46Ar rowspan247Cl rowspan2 styletextalignright 17 rowspan2 styletextalignright 30 rowspan24698871 64 rowspan2101 6 ms β 97 47Ar rowspan232 rowspan2 rowspan2 β n 3 46Ar 48Cl styletextalignright 17 styletextalignright 31 4799495 75 100 ms 200 ns β 48Ar 49Cl styletextalignright 17 styletextalignright 32 4900032 86 50 ms 200 ns β 49Ar 32 50Cl styletextalignright 17 styletextalignright 33 5000784 97 20 ms β 50Ar 51Cl styletextalignright 17 styletextalignright 34 5101449 107 2 ms 200 ns β 51Ar 32 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 Cl Category 氯