Dysprosium: Properties


Isotopes
  Natural
Abun. (%)
Atomic
Mass
Half-
life
Decay Mode
/Energy (/MeV)
Part. En.
/Intensity
(MeV/%)
Cross-sect.
Ther. Neut.
(b)
Spin
(h/2 pi)
Magnetic
Dipl.Mom.
(nm)
Electric
Quad. Mom.
(b)
Gamma En.
/Intensity
(MeV/%)
 141Dy     0.9s E.C.,+           
 142Dy   141.94526 2.3s E.C.,+/ 6           
 143Dy   142.64324 3.9s E.C.,+/ 8.1           
 144Dy   143.93865 9.1s E.C.,+/ 5.6           
 145Dy   144.93693 14s E.C.,+    11/2-      
 146mDy     0.15s I.T.    10+      
 146Dy   145.93252 30s E.C.,+/ 5           
 147mDy     56s I.T.,+,E.C.    11/2- -0.66 nm 0.7 b Dy k x rays
0.072
0.6787
 147Dy   146.93068 75s E.C.,+/ 6.6    1/2+ -0.92 nm   rad. an.
0.1007
0.2534
0.3653
 148Dy   147.92702 3.1m +/ 2.68
E.C.
1.2  0+     rad. an.
Tb k x rays
0.6202
 149Dy   148.92711 4.2m +,E.C./ 3.6    7/2- -0.12 nm -0.62 b rad. an.
0.1008
0.1063
0.2534
0.6536
0.7894
1.7765
1.8062
 150Dy   149.925577 7.18m +,E.C./ 1.79
alpha
 
4.233
 0+     Tb k x rays
0.3967
 151Dy   150.926032 17m +/ 2.869
E.C.,alpha
 
4.067
 7/2- -0.95 nm -0.3 b Tb k x rays
0.1764
0.303
0.3861
0.5463
0.16 - 2.09
 152Dy   151.924716 2.37h E.C./ 0.64
alpha
 
3.63
 0+     Tb k x rays
0.2569
 153Dy   152.925769 6.3h +/ 2.17
E.C.,alpha
0.89
3.46
 7/2- -0.78 nm -0.02 b Tb k x rays
0.0807
0.0997
0.2137
0.08 - 1.66
 154Dy   153.924429 3x106y alpha 2.87  0+      
 155Dy   154.925747 9.9h +/ 2.1
E.C.
0.845  3/2- -0.385 nm 1.04 b Tb k x rays
0.0655
0.2269
 156Dy 0.06 % 155.925277       33 b0+      
 157Dy   156.92546 8.1h E.C./ 1.34    3/2- -0.301 nm 1.3 b Tb k x rays
0.3262
 158Dy 0.1 % 157.924403       43 b0+      
 159Dy   158.925735 144d E.C./ 0.366   8000 b3/2- -0.354 nm 1.37 b Tb k x rays
0.3262
 160Dy 2.34 % 159.925193       60 b0+      
 161Dy 18.9 % 160.92693       600 b5/2+ -0.48 nm 2.51 b  
 162Dy 25.5 % 161.926795       170 b0+      
 163Dy 24.9 % 162.928728       120 b5/2- 0.673 nm 2.65 b  
 164Dy 28.2 % 163.929171       2700 b0+      
 165mDy     1.26m I.T./ 0.108
-
  2000 b1/2-     Dy k x rays
0.1082
0.5155
 165Dy   164.9317 2.33h -/ 1.286 1.29 3500 b7/2+ -0.52 nm -3.5 b Ho k x rays
0.09468
 166Dy   165.932803 3.4d -/ 0.486 0.4  0+     Ho k x rays
0.0282
0.0825
 167Dy   166.93565 6.2m -/ 2.35 1.78  1/2-     Ho k x rays
0.2593
0.3103
0.5697
0.06 - 1.4
 168Dy   167.9372 8.5m -/ 1.8    0+     Ho k x rays
0.1925
0.4867
 169Dy     39s