Low-Energy Photodisintegration of the Deuteron and Big-Bang Nucleosynthesis

Details Low-Energy Photodisintegration of the Deuteron and Big-Bang Nucleosynthesis Low-Energy Photodisintegration of the Deuteron and Big-Bang Nucleosynthesis

2003-09-10

arxiv.org/abs/nucl-ex/0309009v1

Phys.Lett. B574 (2003) 8-13

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 5 figures

Scientific paper

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 obtained from Big-Bang Nucleosynthesis can be reduced at least by 20%.

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