Thermal neutron captures on d and ³He

We report on a study of the nd and nHe3 radiative captures at thermal neutron energies, using wave functions obtained from either chiral or conventional two- and three-nucleon realistic potentials with the hyperspherical-harmonics method, and electromagnetic currents derived in chiral effective field theory up to one loop. The predicted nd and nHe3 cross sections are in good agreement with data, but exhibit a significant dependence on the input Hamiltonian. A comparison is also made between these and new results for the nd and nHe3 cross sections obtained in the conventional framework for both potentials and currents.