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1.	Roger, T., et al. (author) Precise Determination of the Unperturbed B8 Neutrino Spectrum 2012 In: Phys. Rev. Lett.. ; 108:16, s. Art. no. 162502- Journal article (peer-reviewed)abstract A measurement of the final state distribution of the 8B beta decay, obtained by implanting a 8B beam in a double-sided silicon strip detector, is reported here. The present spectrum is consistent with a recent independent precise measurement performed by our collaboration at the IGISOL facility, Jyvaskyla [O. S.Kirsebom et al., Phys. Rev. C 83, 065802 (2011)]. It shows discrepancies with previously measuredspectra, leading to differences in the derived neutrino spectrum. Thanks to a low detection threshold, theneutrino spectrum is for the first time directly extracted from the measured final state distribution, thusavoiding the uncertainties related to the extrapolation of R-matrix fits. Combined with the IGISOL data,this leads to an improvement of the overall errors and the extension of the neutrino spectrum at highenergy. The new unperturbed neutrino spectrum represents a benchmark for future measurements of thesolar neutrino flux as a function of energy.

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Type of publication: journal article (1)

Type of content: peer-reviewed (1)

Author/Editor: Lantz, Mattias, 1971 ... (2); Buscher, J. (1); Tengblad, O (1); Sohani, M (1); Borge, M. J. G. (1); Galaviz, D. (1); show more...; Perea, A. (1); Riisager, K. (1); Fynbo, H. O. U. (1); Alcorta, M. (1); Hyldegaard, S. (1); Kirsebom, O. S. (1); Cocolios, T. E. (1); Huyse, M. (1); Gasques, L. R. (1); Raabe, R. (1); Cruz, J. (1); Duppen, P. Van (1); Dendooven, P. (1); Bastin, B (1); Carmona-Gallardo, M. (1); Saastamoinen, A. (1); Roger, T. (1); Jungmann, K. (1); Traykov, E. (1); Wilschut, H. W. (1); Äystö, J. (1); Giri, G. S. (1); Kruithof, W. L. (1); Santra, B. (1); Shidling, P. D. (1); Sørensen, A. J. (1); van der Hoek, D. J. (1); Versolato, O. O. (1); show less...

University: Uppsala University (1); Chalmers University of Technology (1)

Language: English (1)

Research subject (UKÄ/SCB): Natural sciences (1)

Year: 2012 (1)

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