... thickness with normal-density concreoter a much thinner shield withconcrete of very high density. Since the attenuation was accompanied by a rise in temperaturewhich produced higher stresses ina thicker cylinder, a thinner shield of greater density seemed preferable. The neutron attenuation was most...

... recently been awarded the Nobel Prize for the work. These inventions greatly increased the efficiency and seope of the nuclear reactions that were now becoming possible. In 1932, Chadwick discovered a new radiation as a product of one of these nuclear reactions. He called it the neutron, because it carried...