Precise and accurate determination of the B8 decay spectrum

June 2011 • 2011PhRvC..83f5802K

Authors • Kirsebom, O. S. • Hyldegaard, S. • Alcorta, M. • Borge, M. J. G. • Büscher, J. • Eronen, T. • Fox, S. • Fulton, B. R. • Fynbo, H. O. U. • Hultgren, H. • Jokinen, A. • Jonson, B. • Kankainen, A. • Karvonen, P. • Kessler, T. • Laird, A. • Madurga, M. • Moore, I. • Nyman, G. • Penttilä, H. • Rahaman, S. • Reponen, M. • Riisager, K. • Roger, T. • Ronkainen, J. • Saastamoinen, A. • Tengblad, O. • Äystö, J.

Abstract • Accurate measurements of the B8 neutrino spectrum are important for the interpretation of solar neutrino data. Experimentally, the B8 neutrino spectrum can be obtained from the measurement of the β-delayed α spectrum. We report on an α-α coincidence measurement performed at the IGISOL facility in Jyväskylä, Finland. Our measurement allows extensive cross-checks to be performed and gives a more intense neutrino spectrum at high energies compared to the present standard. The deviation reaches 4% at the end point of the spectrum. Below 11 MeV, the deviation is less than 1%.

Links

• ELECTR http://link.aps.org/doi/10.1103/PhysRevC.83.065802