18-Argon

 Nuclide      weight or level energy         spin & parity  abundance  half-life      sig(J32) sig(J33) sig(J40) 
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 Ar-nat     39.948         +- 0.001                                                                       XXX    
 Ar- 31     31.012124      +- 0.000221       5/2+                      15MS 3                                    
 Ar- 32     31.997637806   +- 0.000001900    0+                        98MS 2                                    
 Ar- 33     32.989925530   +- 0.000000430    1/2+                      173.0MS 20                                
 Ar- 34     33.980271063   +- 0.000000360    0+                        844.5MS 34                                
 Ar- 35     34.975257613   +- 0.000000801    3/2+                      1.775S 4                                  
 Ar- 36     35.967545107   +- 0.000000029    0+               0.3336   stable                                    
 Ar- 37     36.966776303   +- 0.000000221    3/2+                      35.04D 4                                  
 Ar- 38     37.962732196   +- 0.000000262    0+               0.0629   stable                                    
 Ar- 39     38.964313038   +- 0.000005367    7/2-                      269Y 3                                    
 Ar- 40     39.96238312370 +- 0.00000000240  0+              99.6035   stable           XXX      XXX      XXX    
 Ar- 41     40.964500571   +- 0.000000372    7/2-                      109.61M 4                                 
 Ar- 42     41.963045737   +- 0.000006200    0+                        32.9Y 11                                  
 Ar- 43     42.965636056   +- 0.000005700    (5/2-)                    5.37M 6                                   
 Ar- 44     43.964923829   +- 0.000001700    0+                        11.87M 5                                  
 Ar- 45     44.968039750   +- 0.000000550    5/2-,7/2-                 21.48S 15                                 
 Ar- 46     45.968084079   +- 0.000043741    0+                        8.4S 6                                    
 Ar- 47     46.972936232   +- 0.000096381    (3/2-)                    1.23S 3                                   
 Ar- 48     47.975690      +- 0.000750       0+                        475MS 40                                  
 Ar- 49     48.981980      +- 0.000860                                 170MS 50                                  
 Ar- 50     49.986310      +- 0.000970       0+                        85MS 30                                   
 Ar- 51     50.993700      +- 0.001070                                 unknown                                   
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