In the context of the French Laser-Mégajoule (LMJ) fusion-research programme, the neutron and photon emissions of a high-gain direct-drive target are characterized. The neutron spectrum accounting for primary, secondary, and tertiary nuclear reactions is determined by means of the post-processor Diane of 1D calculations. Photon sources are considered over a wide range of energy from soft x-rays to gamma. Several energy windows of neutron and photon spectra are also identified in order to measure the target areal density.