np ↔ dγ reactions calculated up to Eγ = 20 MeV

We calculate the electromagnetic dipole transition cross sections for the np → dγ and dγ → np reactions over a broad range of energies.~We use the LENPIC nucleon-nucleon interaction obtained from chiral effective field theory (χEFT) up to next-to-next-to-next-to-next-to-leading order (N4LO) and effective electromagnetic dipole transition operators obtained from the same χEFT up to N2LO. Our results agree with existing experiments.~We get results at energies for which experimental data and/or modern theoretical calculations have not been reported. {black} In this study, we utilize a new approach, namely, our adaptation of the Efros [V.~D.~Efros, Phys. Rev. C 99, 034620 (2019)] method that is prospective for future many-body applications in calculations of bound and continuum state wave functions.