Low-energy photodisintegration of the deuteron and Big-Bang nucleosynthesis

W. Tornow, N. G. Czakon, C. R. Howell, A. Hutcheson, J. H. Kelley, V. N. Litvinenko, S. F. Mikhailov, I. V. Pinayev, G. J. Weisel, H. Witała

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The photon analyzing power for the photodisintegration of the deuteron was measured for seven gamma-ray energies between 2.39 and 4.05 MeV using the linearly polarized gamma-ray beam of the high-intensity gamma-ray source at the Duke Free-Electron Laser Laboratory. The data provide a stringent test of theoretical calculations for the inverse reaction, the neutron-proton radiative capture reaction at energies important for Big-Bang nucleosynthesis. Our data are in excellent agreement with potential model and effective field theory calculations. Therefore, the uncertainty in the baryon density Ω Bh2 obtained from Big-Bang Nucleosynthesis can be reduced at least by 20%.

Original languageEnglish (US)
Pages (from-to)8-13
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - Nov 6 2003

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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