Investigation of the Ge(Li) detector background in a multilayer passive shield

The possibilities for reducing background and increasing the sensitivity of the Ge(Li) detector on the account of application of passive multilayer shield are studied. The external shield consists of concrete, polyethylene, cast iron and steel layers. The internal shield is accomplished from lead and steel-3. The results of the Ge(Li) detector background measurements in a low-background chamber by application of only one external or complete shield. The characteristics of the low-background chamber are compared with the background characteristics of other facilities. It is shown that the passive multilayer shield of the low-background chamber has advantages over the majority of facilities with single layer shield of lead