Samßrio: Propriedades


Isˇtopos

  Abund.
Nat. (%)
Massa
Atˇmica
Meia-
vida
Modo de Dec.
/Energia (/MeV)
En. da Part.
/Intensidade
(MeV/%)
SeccŃo Ef.
Neut. Term.
(b)
Spin
(h/2 pi)
Mom. Dip.
MagnÚtico
(nm)
Mom. Quad.
ElÚctrico
(b)
En. dos Gamas
/Intensidade
(MeV/%)
131Sm     1.2s +,C.E.          rad. an.
133Sm     2.9s +,C.E.    5/2+     rad. an.
134Sm   133.93334 11s +,C.E./ 5    0+     rad. an.
135Sm   134.93181 10s +,C.E./ 6.7    7/2+     rad. an.
136Sm   135.92779 42s +,C.E./ 4    0+     rad. an.
137Sm   136.92689 45s +,C.E./ 5.9          rad. an.
138Sm   137.92342 3m +,C.E./ 3.6    0+     rad. an.
0.0536
0.0747
139mSm     10s T.I./ 0.457
+

4.7
 11/2-     Sm k x rays
0.1118
0.1553
0.1901
0.2673
139Sm   138.9226 2.6m +/ 5.5
C.E.
4.1  1/2+ -0.53 nm   Pm k x rays
0.3678
0.4028
0.27 - 2.4
140Sm   139.91904 14.8m +,C.E./ 3 1.9  0+     rad. an.
Pm k x rays
0.1396
0.2255
0.07 - 1.7
141mSm     22.6m +,C.E.,T.I./ 0.1758 1.6
2.19
 11/2- -0.83 nm 1.6 b rad. an.
Pm k x rays
0.1966
0.4318
0.7774
141Sm   140.918473 10.2m +/ 4.53
C.E.
3.2  1/2+ -0.74 nm   rad. an.
Pm k x rays
0.4382
142Sm   141.915206 1.208h +/ 2.1
C.E.
1  0+     rad. an.
Pm k x rays
143mSm     1.1m T.I./ 0.754    11/2-     Sm k x rays
0.754
143Sm   142.91462 8.83m +/ 3.444
C.E.
2.47  3/2+ 1.01 nm 0.4 b rad. an.
Pm k x rays
1.0565
144Sm 3.1 % 143.911998       1.6 b0+      
145Sm   144.913409 340d C.E./ 0.618   280 b7/2- -1.1 nm -0.6 b Pm k x rays
0.0613
0.4924
146Sm   145.913053 1.03x108a alpha 2.5  0+      
147Sm 15 % 146.914895 1.06x1011a alpha 2.53 56 b7/2- -0.815 nm -0.26 b  
148Sm 11.3 % 147.91482 7x1015a alpha 1.96 2.4 b0+      
149Sm 13.8 % 148.917181 1x1016a alpha   4.01x104 b7/2- -0.672 nm 0.075 b  
150Sm 7.4 % 149.917273       102 b0+      
151Sm   150.919929 90a -/ 0.076 0.076 1.52x104 b5/2- -0.363 nm 0.7 b 0.02154
152Sm 26.7 % 151.919729       206 b0+      
153Sm   152.922094 1.929d -/ 0.809 0.64
0.69
420 b3/2+ -0.216 nm 1.3 b Eu k x rays
0.06968
0.10318
154Sm 22.7 % 153.922206       7.2 b0+      
155Sm   154.924636 22.2m -/ 1.628 1.52  3/2-   1.1 b Eu k x rays
0.1043/ 75
156Sm   155.925518 9.4h -/ 0.72 0.43
0.71
 0+     0.0872
0.1657
0.2038
157Sm   156.92821 8m -/ 2.6 2.4  3/2-     Eu k x rays
0.1964
0.1978
0.3942
158Sm   157.93 5.5m -/ 1.8    0+     0.1894/ 100
0.3636/ 82
159Sm   158.93304 11.3s -/ 3.7          0.1898
160Sm   159.93521 9.6 -/ 3.2    0+     0.11