Patent ID: 8158056

Claim:
An arrangement producing metal nanoparticles, the arrangement comprising: a γ-ray irradiator installed inside of a radioactive shielding room; a reactor disposed to oppose the γ-ray irradiator; and a power supply installed in an exterior of the radioactive shielding room to supply power to the reactor, said reactor comprising: a container receiving reaction materials and transmitting energy of γ-rays to reaction materials arranged inside of the reactor, and the container having a top portion and a bottom portion, the bottom portion being disposed opposite to and spaced apart from the top portion, the container having a rounded portion and a planar wall member physically connecting the top and bottom portions, the planar wall member being provided with a planar window facing towards the γ-ray irradiator, an agitator that is installed in the container to be capable of rotating, and a driving source receiving the power from the power supply to drive the agitator.