Tornow, W; Czakon, NG; Howell, CR; Hutcheson, A; Kelley, JH; Litvinenko, VN; Mikhailov, SF; Pinayev, IV; Weisel, GJ; Witała, H, *Low-energy photodisintegration of the deuteron and Big-Bang nucleosynthesis*,
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 574 no. 1-2
(2003),
pp. 8-13 [doi] .
**Abstract:**

*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%. © 2003 Published by Elsevier B.V.*