--- title: "Alpha-decay half-life of Hafnium isotopes reinvestigated by a semi-empirical approach • CBPF Index" description: "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." canonical_url: "https://index.cbpf.br/en/publicacoes/6ad2a767639f62b11adbd2ef" locale: en meta: "og:description": "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." "og:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_Alpha-decay%2Bhalf-life%2Bof%2BHafnium%2Bisotopes%2Breinvestigated%2Bby%2Ba%2Bsemi-empirical%2Bapproach%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~Ty4gQS4gUC4gVGF2YXJlczsgRW1pbCBkZSBMaW1hIE1lZGVpcm9zOyBNLiBMLiBUZXJyYW5vdmE%2Cdetalhe_~MjQvMDgvMjAyMA%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmQyZWYi%2Cs_MAAVMcWwWaRVCfrg.png" "og:image:height": "600" "og:image:type": image/png "og:image:width": "1200" "og:title": "Alpha-decay half-life of Hafnium isotopes reinvestigated by a semi-empirical approach • CBPF Index" "twitter:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_Alpha-decay%2Bhalf-life%2Bof%2BHafnium%2Bisotopes%2Breinvestigated%2Bby%2Ba%2Bsemi-empirical%2Bapproach%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~Ty4gQS4gUC4gVGF2YXJlczsgRW1pbCBkZSBMaW1hIE1lZGVpcm9zOyBNLiBMLiBUZXJyYW5vdmE%2Cdetalhe_~MjQvMDgvMjAyMA%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmQyZWYi%2Cs_MAAVMcWwWaRVCfrg.png" --- > Index of every page on this site: [llms.txt](https://index.cbpf.br/llms.txt) **Physics Note****Published** # **Alpha-decay half-life of Hafnium isotopes reinvestigated by a semi-empirical approach** **O. A. P. Tavares; Emil de Lima Medeiros; M. L. Terranova** 08/24/2020 [**Download PDF **0.4 MB](https://index.cbpf.br/files/publicacao/6ad2a767639f62b11adbd2ef/pdf) [**Contact owner**](mailto:apub@cbpf.br?subject=Alpha-decay%20half-life%20of%20Hafnium%20isotopes%20reinvestigated%20by%20a%20semi-empirical%20approach) ## **Publication details**
Authors
O. A. P. Tavares; Emil de Lima Medeiros; M. L. Terranova
Type
Physics Note
Status
Published
Publication date
24/08/2020
Description
New estimates of partial $\alpha$-decay half-life, $T_{\!1/2}$, for $^{156\mbox{--}162, 174, 176}$Hf isotopes by a semi-empirical, one-parameter model are given. The used model is based on the quantum mechanical tunneling mechanism through a potential barrier, where the Coulomb, centrifugal and overlapping components to the barrier have been considered within the spherical nucleus approximation. This approach enables to reproduce, within a factor 2, the measured $T_{\!1/2}$ of ground-state to ground-state (gs--gs) $\alpha$-transitions for the artificially produced $^{156\mbox{--}162}$Hf isotopes. Half-life predictions for $\alpha$-transitions from the ground-state of $^{159, 161}$Hf isotopes to the first gamma-excited level of $^{155, 157}$Yb isotopes are reported for the first time. The model also provides $T_{\!1/2}$-values of $(2.43\pm 0.28)\times 10^{16}$~a and $(1.47\pm 0.19)\times 10^{20}$~a for the naturally occurring $^{174}$Hf and $^{176}$Hf isotopes, respectively, in quite good agreement with a number of estimates by other authors. In addition, the present methodology indicates that $^{174, 176}$Hf isotopes exhibit $\alpha$-transition to the first gamma-excited level of their daughter Ytterbium isotopes which half-lives are found $(0.9\pm 0.1)\times 10^{18}$~a and $(0.72\pm 0.08)\times 10^{22}$~a, respectively, with a chance of being measured by improved $\alpha$-detection and $\alpha$-spectrometry methods available nowadays.
Year
2020
Number
CBPF-NF-006/20
Linked to a thesis
No
Linked to a grant
No
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