In this answer it is said (and I fully agree)

Yes, a ... photon can accelerate a lone neutron. The kinetic energy imparted to the neutron reduces the photon's wavelength (redshifts it) by the same amount, so the total energy of the system remains the same.

In turn, the opposite process has to be possible too. Neutrons are able to radiate. This usually is said only for charged particles.

Electromagnetic waves are emitted by electrically charged particles undergoing acceleration, and these waves can subsequently interact with other charged particles Electromagnetic radiation

Will a free neutron radiate if it is de-accelerated?

In this answer it is said (and I fully agree):

Yes, a ... photon can accelerate a lone neutron. The kinetic energy imparted to the neutron reduces the photon's wavelength (redshifts it) by the same amount, so the total energy of the system remains the same.

In turn, the opposite process has to be possible too. Neutrons are able to radiate. This usually is said only for charged particles.

Electromagnetic waves are emitted by electrically charged particles undergoing acceleration, and these waves can subsequently interact with other charged particles Electromagnetic radiation

Will a free neutron radiate if it is decelerated?