Physics NotePublished
Alpha Decay Half-Life of Bismuth Isotopes
O. A. P. Tavares; Emil de Lima Medeiros; M. L. Terranova
2004
Publication details
- Authors
- O. A. P. Tavares; Emil de Lima Medeiros; M. L. Terranova
- Type
- Physics Note
- Status
- Published
- Publication date
- 2004
- Description
- The observed alpha decay half-life-values of favoured alpha transitions of $\ell = 5$ in bismuth isotopes have been analyzed in the framework of a model based on the quantum mechanical tunnelling through a potential barrier where the centrifugal and overlapping effects are taken into account. In particular, the very recent measured alpha decay half-life-value of $(1.9\pm 0.2)\times 10^{19}$~y for the unique naturally occurring $^{209}$Bi isotope has been reproduced by the present approach as $(1.0\pm 0.3)\times 10^{19}$~y. Besides, the partial alpha decay half-lives for a number of unmeasured alpha transitions of $\ell = 5$ in bismuth isotopes are predicted by the model, thus making possible to evidence the influence of the 126 neutron shell closure on the alpha decay half-life. The present approach has shown to be successfully applicable to other isotopic sequences of alpha-emitter nuclides.
- Year
- 2004
- Number
- CBPF-NF-033/04
- Linked to a thesis
- No
- Linked to a grant
- No