Astato: 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/%)
196At   195.99573 0.3s alpha 7.6      5 b 6.778/ 99.99
197mAt     4s alpha    1/2+     7.6
197At   196.99341 0.35s +,C.E./ 7.28
alpha

6.96
 9/2- 0.778 nm    
198mAt     1.5s +,C.E.,alpha 6.85       
6.96
Tc k x rays
198At   197.99255 5s alpha 6.75    0.96 nm  
Tc k x rays
199At   198.99058 7.1s +,C.E./ 6.6
alpha
6.64  9/2- 9 nm 0.778 b  
200mAt     4.3s +,C.E.,alpha 6.536  10-    
Tc k x rays
200At   199.99037 43s +,C.E./ 8.1
alpha

6.412/ 21
6.465/ 14
 5+ 9 nm    
201At   200.98844 1.48s +,C.E./ 5.8
alpha/ 6.474

6.344
 9/2-      
202mAt     1.5s T.I./ 0.391           
202At   201.98842 3.02m +,C.E./ 7.2
alpha

6.135/ 7.7
6.225/ 4.3
 5+     rad. an.
0.4413
0.5697
0.6753
203At   202.98679 7.4m +,C.E./ 5.1
alpha/ 6.21

6.088
 9/2-     0.1458
0.2459
0.6414
1.002
1.034
204At   203.98721 9.1m +,C.E./ 6.5
alpha

5.951
 5+     Po k x rays
0.3271
0.4254
0.5156
0.6837
205At   204.986 26m +,C.E./ 4.5
alpha/ 6.02

5.902
 9/2-     Po k x rays
0.1543
0.6696
0.7194
206At   205.98658 29.4m +,C.E./ 5.7
alpha/ 5.881

5.703
 5+     Po k x rays
0.20186
0.39561
0.47716
0.70071
207At   206.98573 1.81h +,C.E./ 3.88
alpha/ 5.873

5.758
 9/2-     Po k x rays
0.16801
0.58842
0.81448
208At   207.98651 1.63h +,C.E./ 4.93
alpha/ 5.752

5.626/ 0.01
5.641/ 0.53
 6+     Po k x rays
0.177
0.206
0.6601
0.6852
0.845
1.0281
209At   208.986149 5.4h +,C.E./ 4.93
alpha/ 5.757

5.647/ 4.1
 6+     Po k x rays
0.10422
0.54503
0.78189
0.7902
0.1 - 2.6
210At   209.987126 8.1h C.E./ 3.98
alpha/ 5.632

5.361/ 0.05
5.442/ 0.05
 5+     Po k x rays
0.24535
0.52758
1.18143
1.43678
1.48335
0.04 - 2.4
211At   210.987469 7.21h C.E./ 0.78
alpha/ 5.98

5.211/ 0.004
5.868/ 42
 9/2-     Po k x rays
0.66956
0.687
0.74263
212mAt     0.119s alpha 7.837/ 65
7.897/ 33
 9-      
212At   211.990725 0.314s alpha/ 7.828 7.058/ 0.4
7.088/ 0.6
7.618/ 15
7.681/ 84
 1-      
213At   212.992911 0.11Ás alpha/ 9.254 9.08  9/2-      
214mAt     0.76Ás alpha/ 8.762    9-      
214At   213.976347 0.56Ás alpha/ 8.987 8.819/ 100  1-      
215At   214.998638 0.1ms alpha/ 8.178 7.626/ 0.045
8.023/ 99.9
 9/2-     0.40486
216At   216.00239 0.3ms alpha/ 7.947 7.595/ 0.2
7.697/ 2.1
7.8/ 97
 1-      
217At   217.004694 32ms alpha/ 7.202 6.812/ 0.06
7.067/ 99.9
 9/2-     0.2595
0.3345
0.594
218At   218.008694 1.6s alpha/ 6.883 6.654/ 6
6.695/ 90
6.748/ 4
        
219At   219.0113 50s alpha/ 6.39 6.275         
220At   220.01534 3.71m -          0.24 - 0.7
221At     2.3m             
222At     5.4s             
223At     50s