661 



TABLE 719.— ATOMIC WEIGHTS AND OTHER CHARACTERISTICS OF ISOTOPES 



(continued) 



51 



52 



53 



54 



55 

 56 



57 

 58 

 59 

 60 



61 

 62 



63 



64 



65 

 66 

 67 

 68 

 69 

 70 



71 



72 



73 

 74 



Element 



Sb 



Te 



I 

 Xe 



Cs 

 Ba 



La 

 Ce 

 Pr 



Nd 



Pr 



Sm 



Eu 

 Gd 



Tb 



Dy 



Ho 



Er 



Tm 



Yb 



Lu 



Hf 



Ta 

 W 



Isotope 



116 

 117 

 118 

 119 

 120 

 122 

 124 

 121 

 123 

 123 

 125 

 126 

 128 

 130 

 127 

 129 

 129 

 131 

 132 

 134 

 136 

 133 

 135 

 137 

 134 

 135 

 136 

 137 

 138 

 139 



141 

 145 

 146 

 148 

 150* 



147 

 149 

 151 

 153 

 154 

 155 

 156 

 157 

 158 

 160 

 159 



165 



169 



171 



173 



175 



176* 



177 



178 



179 



180 



181 



182 



183 



Atomic 

 mass 



115.939 

 116.937 

 117.937 

 118.938 

 119.937 

 121.945 

 123.944 



126.92 



132 91 



138.953 



140.95 



144.962 



145.962 



147.962 



149.964 



153.971 

 154.971 

 155.972 

 156.973 

 157.973 

 159.974 

 159.2 



164.94 



169.4 



180.88 



Spin ' 



(0) 

 1/2 

 (0) 

 1/2 

 (0) 



5/2 

 7/2 

 1/2 

 1/2 

 (0) 

 (0) 

 (0) 

 5/2 

 7/2 

 1/2 

 3/2 

 (0) 

 (0) 

 (0) 

 7/2 

 7/2 

 7/2 

 (0) 

 3/2 

 (0) 

 3/2 

 (0) 

 7/2 



5/2 



(>l/2) 

 (>l/2) 



5/2 

 5/2 



3/2 



7/2 



1/2 

 1/2 

 5/2 

 7/2 

 ^7 



(1/2,3/2) 

 (0) 



(1/2,3/2) 

 (0) 

 7/2 

 (0) 

 1/2 



(continued) 



Magnetic 

 moment ' 



~0 



— .9997 ±2 



~0 



— 1.0459±2 



~0 



+3.3591 ±5 

 +2.5465±5 



~0 

 ~0 

 ~0 



+2.8086±8 

 ( + )2.74±14h 

 - .7766±1 

 + -7 

 ~0 

 ~0 

 ~0 



+2.5771±9 

 +2.727 \±33 

 +2.8397±30 

 ~0 



+ .8346±25 

 ~0 



+ .9351 ±27 

 ~0 

 +2.7769±28 



+4.5938 



+3.4 

 + 1.5 



+ .45 

 - .65 

 +2.6 

 +3.8 



~0 



~0 

 +2.1 



Quadrupole 

 moment t * 



- .3±2 

 ■1.2±2 



— .59±20 



— .43±15 



< .1 



^ .3 



^0 



+ 1.2 



+2.5 



+3.9±4 



+5.9 



+7±1 



+6 



SMITHSONIAN PHYSICAL TABLES 



