Measurement of the branching ratio for β-delayed α decay of 16N
| Autor: | J. Refsgaard, O.S. Kirsebom, E.A. Dijck, H.O.U. Fynbo, M.V. Lund, M.N. Portela, R. Raabe, G. Randisi, F. Renzi, S. Sambi, A. Sytema, L. Willmann, H.W. Wilschut |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Physics Letters B, Vol 752, Iss C, Pp 296-301 (2016) |
| Druh dokumentu: | article |
| ISSN: | 0370-2693 1873-2445 |
| DOI: | 10.1016/j.physletb.2015.11.047 |
| Popis: | While the C12(α,γ)16O reaction plays a central role in nuclear astrophysics, the cross section at energies relevant to hydrostatic helium burning is too small to be directly measured in the laboratory. The β-delayed α spectrum of 16N can be used to constrain the extrapolation of the E1 component of the S-factor; however, with this approach the resulting S-factor becomes strongly correlated with the assumed βα branching ratio. We have remeasured the βα branching ratio by implanting 16N ions in a segmented Si detector and counting the number of βα decays relative to the number of implantations. Our result, 1.49(5)×10−5, represents a 24% increase compared to the accepted value and implies an increase of ≈10% in the extrapolated S-factor. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
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