Precision Measurement of the Be7(p,γ)B8 Cross Section with an Implanted Be7 Target

L. T. Baby, C. Bordeanu, G. Goldring, M. Hass, L. Weissman, V. N. Fedoseyev, U. Köster, Y. Nir-El, G. Haquin, H. W. Gäggeler, and R. Weinreich (ISOLDE Collaboration)
Phys. Rev. Lett. 90, 022501 – Published 15 January 2003; Erratum Phys. Rev. Lett. 92, 029901 (2004)

Abstract

The Be7(p,γ)B8 reaction plays a central role in the evaluation of solar neutrino fluxes. We report on a new precision measurement of the cross section of this reaction, following our previous experiment with an implanted Be7 target, a raster-scanned beam, and the elimination of the backscattering loss. The new measurement incorporates a more abundant Be7 target and a number of improvements in design and procedure. The point at Elab=991keV was measured several times under varying experimental conditions, yielding a value of S17(Ec.m.=850keV)=24.0±0.5eVb. Measurements were carried out at lower energies as well. Because of the precise knowledge of the implanted Be7 density profile, it was possible to reconstitute both the off- and on-resonance parts of the cross section and to obtain from the entire set of measurements an extrapolated value of S17(0)=21.2±0.7eVb.

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  • Received 7 August 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.022501

©2003 American Physical Society

Erratum

Erratum: Precision Measurement of the Be7(p,γ)B8 Cross Section with an Implanted Be7 Target [Phys. Rev. Lett. 90, 022501 (2003)]

L. T. Baby, C. Bordeanu, G. Goldring, M. Hass, L. Weissman, V. N. Fedoseyev, U. Köster, Y. Nir-El, G. Haquin, H. W. Gäggeler, and R. Weinreich (the ISOLDE Collaboration)
Phys. Rev. Lett. 92, 029901 (2004)

Authors & Affiliations

L. T. Baby1, C. Bordeanu1,*, G. Goldring1, M. Hass1, L. Weissman2, V. N. Fedoseyev3, U. Köster3, Y. Nir-El4, G. Haquin4, H. W. Gäggeler5, and R. Weinreich5 (ISOLDE Collaboration)

  • 1Department of Particle Physics, Weizmann Institute of Science, Rehovot, Israel
  • 2NSCL, Michigan State University, East Lansing, Michigan 48824
  • 3ISOLDE, CERN, Geneva, Switzerland
  • 4Soreq Research Centre, Yavne, Israel
  • 5Paul Scherrer Institute, Villigen, Switzerland

  • *On leave from Horia Hulubei Institute, Bucharest, Romania.

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Vol. 90, Iss. 2 — 17 January 2003

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