Precise and accurate determination of the 8B decay spectrum

Kirsebom, OS; Hyldegaard, S; Alcorta, M; Borge, MJG; Büscher, Jeroen; Eronen, T; Fox, S; Fulton, BR; Fynbo, HOU; Hultgren, H; Jokinen, A; Jonson, B; Kankainen, A; Karvonen, P; Kessler, T; Laird, A; Madurga, M; Moore, I; Nyman, G; Penttil¨a, H; Rahaman, S; Reponen, M; Riisager, K; Roger, Thomas; Ronkainen, J; Saastamoinen, A; Tengblad, O; A¨ ysto¨, J

doi:10.1103/PhysRevC.83.065802

Precise and accurate determination of the 8B decay spectrum

Author:

Kirsebom, OS

Hyldegaard, S ; Alcorta, M ; Borge, MJG ; Büscher, Jeroen ; Eronen, T ; Fox, S ; Fulton, BR ; Fynbo, HOU ; Hultgren, H ; Jokinen, A ; Jonson, B ; Kankainen, A ; Karvonen, P ; Kessler, T ; Laird, A ; Madurga, M ; Moore, I ; Nyman, G ; Penttil¨a, H ; Rahaman, S ; Reponen, M ; Riisager, K ; Roger, Thomas ; Ronkainen, J ; Saastamoinen, A ; Tengblad, O ; A¨ ysto¨, J

Keywords:

Science & Technology, Physical Sciences, Physics, Nuclear, Physics, ALPHA-SPECTRA, ENERGY-LEVELS, LIGHT-NUCLEI, PROTON EMISSION, STOPPING POWER, BETA-DECAY, LI-8, STATES, OSCILLATIONS, DETECTORS, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics

Abstract:

Accurate measurements of the 8B neutrino spectrum are important for the interpretation of solar neutrino data. Experimentally, the 8B 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 Jyv¨askyl¨a, 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%.