TABLE DES ISOTOPES

6Z Noms Symb ole A MasseAtomique[u]Abondance(éléments stables)[%]Demi-vie etType d'Émission(E en MeV)59 praséodyme Pr 141142143140,907 648141,909 790142,910 630100,19,1 h, - (2,16)13,8 d, - (0,92)60 néodyme Nd 14214314414761 prométhéum Pm 145147141,907 719142,909 620143,909 900146,915 830144,912 75146,914 86027,13(12,20)(23,87) 10 16 a11,6 d, - (0,81)17,7 a , CE, ,2,6 a, - (0,23)62 samarium Sm 147152153146,914 620151,919 729152,921 580(15,07)26,630,13 × 10 12 a47 h, - (0,71)63 europium Eu 153154155152,921 226153,922 350154,922 27052,2316 a, - (1,5)1,7 a, - (0,15)64 gadolinium Gd 158 157,924 100 24,8765 terbium Tb 159 158,925 344 100,66 dysprosium Dy 164 163,928 173 28,1867 holmium Ho 165 164,930 292 100,68 erbium Er 166 165,929 400 33,4169 thulium Tm 169 168,934 213 100,70 ytterbium Yb 174 173,938 861 31,671 lutécium Lu 175176174,940 771175,941 44097,39(2,61) 0,03 × 10 12 a, - (0,3)72 hafnium Hf 179180181178,944 420179,946 548180,947 28013,7835,2(19 s)(5,5 h)46 d, - (0,41)73 tanta le Ta 180181182179,945 720180,947 994181,948 3300,012399,988(8,1 h)(0,33 s)115 d, - (0,52)74 tungstène[«wolfram»]W 180183184185187179,944 970182,948 490183,950 929184,950 500186,956 390(0,135)?14,430,7(10 14 a, , 3)?(5,5 s)74 d, - (0,43)24 h, - (0,62)75 rhénium Re 186187188185,954 080186,955 747187,957 260(62,60)91 h, - (1,07)0,04 × 10 12 a, - (0,008)17 h, - (2,12)76 osmium Os 185187190191192193184,951 100186,954 970189,957 420190,961 01191,961 469192,963 5501,6426,441,095 d, CE(35 h)(9 min)15,4 d, - (0,14), 31 h, - (1,10)