Abstract：We use effective field theory (EFT) for the calculation of neutron–deuteron radiative capture at very low energies. We present here the use of EFT to calculate a low-energy photo-nuclear observable in three-body systems, the photon polarization parameter and fore–aft asymmetry at thermal neutron energies up to next-to-next to leading order (N2LO), with inclusion of the electric quadrupole contribution. The photon polarization parameter in total is found to be Rc=?0.421±0.003 and is in good agreement with the other modern theoretical calculations based on modern nucleon–nucleon potentials. In comparison with our previous work, a satisfactory agreement with the available experimental data is found by inclusion of the electric quadrupole contribution.
. [J]. 中国物理快报, 2014, 31(09): 92102-092102.
H. Sadeghi, M. Mosavi-Khansari. The Photon Polarization Parameter of 2H(n,γ)3H reaction with Inclusion of the Electric Quadrupole Contribution. Chin. Phys. Lett., 2014, 31(09): 92102-092102.
2014, Vol. 31 
