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Phys. Rev. D 68, 072001 (2003) [6 pages]

Photodisintegration of deuterium and big bang nucleosynthesis

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K. Y. Hara, H. Utsunomiya, S. Goko, H. Akimune, T. Yamagata, and M. Ohta
Department of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501, Japan

H. Toyokawa, K. Kudo, A. Uritani, and Y. Shibata
National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan

Y.-W. Lui
Cyclotron Institute, Texas A & M University, College Station, Texas 77843, USA

H. Ohgaki
Institute of Advanced Energy, Kyoto University, Gokanosho, Uji, Kyoto 611-0011, Japan

Received 27 April 2003; revised 24 June 2003; published 8 October 2003

Photodisintegration cross sections were measured for deuterium with Laser-Compton scattering γ beams at seven energies near threshold. Combined with the preceding data, R(E)=Naσv for the p(n,γ)D reaction is for the first time evaluated based on experimental data with 6% uncertainty in the energy region relevant to the big bang nucleosynthesis (BBN). The result confirms the theoretical evaluation on which the BBN in the precision era relies.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.68.072001
DOI:
10.1103/PhysRevD.68.072001
PACS:
25.20.-x, 26.35.+c, 26.65.+t, 27.10.+h
 
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