Gamma rays are not streams of neutrons.

γ particle flow is the ray released when the nuclear energy level transition is de-excited, and is an electromagnetic wave with a wavelength shorter than 0.01 angstroms. The neutron flow is a material flow and is composed of uncharged particles. This is not a concept and needs to be distinguished.

Extended information:

The production principle of gamma rays:

The new nuclei produced after alpha decay and beta decay of radioactive nuclei are often at high energy levels. To transition to a lower energy level, γ photons are radiated. Both nuclear decay and nuclear reactions can produce gamma rays. It is an electromagnetic wave with a wavelength shorter than 0.2 Angstroms. The wavelength of γ-rays is shorter than that of X-rays, so γ-rays have stronger penetrating power than X-rays.

Gamma rays are electromagnetic wave photons with frequencies higher than 1.5 quadrillion Hz. Gamma rays have no electric charge or static mass, so they have weaker ionization ability than alpha particles and beta particles. Gamma rays have extremely strong penetrating ability and high energy. Gamma rays can be stopped by nuclei with high atomic numbers, such as lead or spent uranium.

Baidu Encyclopedia-γ Ray