In-Situ Environmental Gamma-Ray Spectrometry Using an Upward-Looking Dip-Stick Type Ge(Li) Detector

For in-situ Ge(Li) measurement of environmental gamma-rays, down-looking Ge(Li) detectors are generally used. Similar measurement can be made using ordinary upward-looking dip-stick type Ge(Li) detectors. The detection characteristics of an upward-looking 49cm3 coaxial Ge(Li) detector mounted in a vertical dip-stick type cryostat is described as an in-situ environmental gamma-ray spectrometer. A comparison is made between the results obtained using the upward-looking Ge(Li) detector and a down-looking Ge(Li) detector.