A transportable system for the measurement of liver cadmium in vivo

A system is described for liver cadmium measurement. The neutron source is a 10 Ci238Pu/Be source which is double-encapsulated in a stainless steel cylinder. The neutron output is collimated by placing it in a specially designed box. LiF-doped resin effectively limits the beam spot to a diameter of 10 cm. The detector used is a coaxial lithium-drifted germanium semiconductor.