Photodisintegration of deuterium and big bang nucleosynthesis

被引:51
|
作者
Hara, KY
Utsunomiya, H
Goko, S
Akimune, H
Yamagata, T
Ohta, M
Toyokawa, H
Kudo, K
Uritani, A
Shibata, Y
Lui, YW
Ohgaki, H
机构
[1] Konan Univ, Dept Phys, Higashinada Ku, Kobe, Hyogo 6588501, Japan
[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan
[3] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA
[4] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan
关键词
D O I
10.1103/PhysRevD.68.072001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Photodisintegration cross sections were measured for deuterium with Laser-Compton scattering gamma beams at seven energies near threshold. Combined with the preceding data, R(E)=N(a)sigmav for the p(n,gamma)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.
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页数:6
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