鑭（原子量：13890547 7）的同位素，其中有 1 個同位素是穩定的。 圖表 rowspan2116La rowspan2 styletextalignright 57 rowspan2 styletextalignright 59 rowspan2 rowspan250 22 ms （60） 115Ba rowspan2 rowspan2 rowspan2 （40） 116Ba rowspan2117La rowspan2 styletextalignright 57 rowspan2 styletextalignright 60 rowspan211695007 43 rowspan2235 26 ms 117Ba rowspan23232 rowspan2 rowspan2 116Ba styletextindent1em 117mLa colspan3 styletextindent2em 151 12 keV 10 5 ms 92 118La styletextalignright 57 styletextalignright 61 11794673 32 200 ms 118Ba 119La styletextalignright 57 styletextalignright 62 11894099 43 1 s 119Ba 112 rowspan2120La rowspan2 styletextalignright 57 rowspan2 styletextalignright 63 rowspan211993807 54 rowspan228 2 s 120Ba rowspan2 rowspan2 rowspan2 119Cs rowspan2121La rowspan2 styletextalignright 57 rowspan2 styletextalignright 64 rowspan212093301 54 rowspan253 2 s 121Ba rowspan2112 rowspan2 rowspan2 120Cs rowspan2122La rowspan2 styletextalignright 57 rowspan2 styletextalignright 65 rowspan212193071 32 rowspan286 5 s 122Ba rowspan2 rowspan2 rowspan2 121Cs 123La styletextalignright 57 styletextalignright 66 12292624 21 17 3 s 123Ba 112 124La styletextalignright 57 styletextalignright 67 12392457 6 2921 17 s 124Ba 78 styletextindent1em 124mLa colspan3 styletextindent2em 100 100 keV 21 4 s low 125La styletextalignright 57 styletextalignright 68 124920816 28 648 12 s 125Ba 112 styletextindent1em 125mLa colspan3 styletextindent2em 1070 10 keV 390 40 ms 32 126La styletextalignright 57 styletextalignright 69 12591951 10 54 2 s 126Ba 5 styletextindent1em 126mLa colspan3 styletextindent2em 210 410 keV 20 20 s 012 127La styletextalignright 57 styletextalignright 70 126916375 28 51 1 min 127Ba 112 rowspan2 styletextindent1em 127mLa rowspan2 colspan3 styletextindent2em 148 12 keV rowspan237 4 min 127Ba rowspan232 rowspan2 rowspan2 IT 127La 128La styletextalignright 57 styletextalignright 71 12791559 6 518 14 min 128Ba 5 styletextindent1em 128mLa colspan3 styletextindent2em 100 100 keV 14 min IT 128La 12 129La styletextalignright 57 styletextalignright 72 128912693 22 116 2 min 129Ba 32 styletextindent1em 129mLa colspan3 styletextindent2em 1721 4 keV 560 50 ms IT 129La 112 130La styletextalignright 57 styletextalignright 73 129912369 28 87 1 min 130Ba 3 131La styletextalignright 57 styletextalignright 74 13091007 3 59 2 min 131Ba 32 styletextindent1em 131mLa colspan3 styletextindent2em 30452 24 keV 170 10 µs 112 132La styletextalignright 57 styletextalignright 75 13191010 4 48 2 h 132Ba 2 rowspan2 styletextindent1em 132mLa rowspan2 colspan3 styletextindent2em 18818 11 keV rowspan2243 5 min IT 76 132La rowspan26 rowspan2 rowspan2 24 132Ba 133La styletextalignright 57 styletextalignright 76 13290822 3 3912 8 h 133Ba 52 134La styletextalignright 57 styletextalignright 77 133908514 21 645 16 min 134Ba 1 135La styletextalignright 57 styletextalignright 78 134906977 11 195 2 h 135Ba 52 136La styletextalignright 57 styletextalignright 79 13590764 6 987 3 min 136Ba 1 styletextindent1em 136mLa colspan3 styletextindent2em 255 9 keV 114 3 ms IT 136La 8 137La styletextalignright 57 styletextalignright 80 136906494 14 6 2104 a 137Ba 72 rowspan2138La 放射性同位素 rowspan2 styletextalignright 57 rowspan2 styletextalignright 81 rowspan2137907112 4 rowspan2102 11011 a 664 138Ba rowspan25 rowspan290 1104 rowspan2 336 138Ce styletextindent1em 138mLa colspan3 styletextindent2em 7257 3 keV 116 5 ns 3 139La 裂變產物 styletextalignright 57 styletextalignright 82 1389063533 26 colspan3 aligncenter 72 099910 1 140La styletextalignright 57 styletextalignright 83 1399094776 26 16781 3 d 140Ce 3 141La styletextalignright 57 styletextalignright 84 140910962 5 392 3 h 141Ce 72 142La styletextalignright 57 styletextalignright 85 141914079 6 911 5 min 142Ce 2 143La styletextalignright 57 styletextalignright 86 142916063 17 142 1 min 143Ce 72 144La styletextalignright 57 styletextalignright 87 14391960 5 408 4 s 144Ce 3 145La styletextalignright 57 styletextalignright 88 14492165 10 248 20 s 145Ce 52 rowspan2146La rowspan2 styletextalignright 57 rowspan2 styletextalignright 89 rowspan214592579 8 rowspan2627 10 s 9999 146Ce rowspan22 rowspan2 rowspan2 007 145Ce styletextindent1em 146mLa colspan3 styletextindent2em 130 130 keV 100 1 s 146Ce 6 rowspan2147La rowspan2 styletextalignright 57 rowspan2 styletextalignright 90 rowspan214692824 5 rowspan24015 8 s 9996 147Ce rowspan252 rowspan2 rowspan2 04 146Ce rowspan2148La rowspan2 styletextalignright 57 rowspan2 styletextalignright 91 rowspan214793223 6 rowspan2126 8 s 9985 148Ce rowspan22 rowspan2 rowspan2 15 147Ce rowspan2149La rowspan2 styletextalignright 57 rowspan2 styletextalignright 92 rowspan214893473 34 rowspan2105 3 s 986 149Ce rowspan252 rowspan2 rowspan2 14 148Ce rowspan2150La rowspan2 styletextalignright 57 rowspan2 styletextalignright 93 rowspan214993877 43 rowspan2510 30 ms 973 150Ce rowspan23 rowspan2 rowspan2 27 149Ce 151La styletextalignright 57 styletextalignright 94 15094172 43 300 ms 300 ns 151Ce 52 152La styletextalignright 57 styletextalignright 95 15194625 43 200 ms 300 ns 152Ce 153La styletextalignright 57 styletextalignright 96 15294962 64 150 ms 300 ns 153Ce 52 154La styletextalignright 57 styletextalignright 97 15395450 64 100 ms 154Ce 155La styletextalignright 57 styletextalignright 98 15495835 86 60 ms 155Ce 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 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 La Category 鑭