Notes
| Isotopes of Tungsten |
| Notes
|
| Naturally occurring tungsten consists of five isotopes whose half-lives are so long that they can be considered stable. Theoretically, all five can decay into isotopes of element 72 (hafnium) by alpha emission, but only 180W has been observed to do so with a half-llife of 1.8 x 1018 years; on average, this yields about two alpha decays of 180W in one gram of natural tungsten per year. |
 Notable Isotopes  |
 180W [106 neutrons] |
 Abundance: 0.12%
|
| Half life: 1.8 x 1018 years [ Alpha Decay ]
|
| Decay Energy: 2.516 MeV |
| Decays to 176Hf.
|
| 181W [107 neutrons] |
| Abundance: synthetic
|
| Half life: 121.2 days [ Electron Capture ]
|
| Decay Energy: 0.188 MeV |
| Decays to 181Ta.
|
| 182W [108 neutrons] |
| Abundance: 26.50%
|
| Stable with 108 neutrons
|
| 183W [109 neutrons] |
| Abundance: 14.3%
|
| Stable with 109 neutrons
|
| 184W [110 neutrons] |
| Abundance: 30.64%
|
| Stable with 110 neutrons
|
| 185W [111 neutrons] |
| Abundance: synthetic
|
| Half life: 75.1 days [ beta- ]
|
| Decay Energy: 0.433 MeV |
| Decays to 185Re.
|
| 186W [112 neutrons] |
| Abundance: 28.43%
|
| Stable with 112 neutrons
|