Related Experiment Video
Updated: Jul 11, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
Published on: February 1, 2016
Application of a Ge semi-conductor detector to whole-body counter
S Kinase1, H Noguchi, T Nakamura
1Japan Atomic Energy Research Institute, 2-4 Shirane, Shirakata, Tokai-mura, Ibaraki 319-1195, Japan. skinase@popsvr.tokai.jaeri.go.jp
Abstract:
To calibrate a whole-body counter, it is necessary to find a determination method for peak efficiencies of detectors used in the whole-body counter. For this purpose, peak efficiencies of a Ge semiconductor detector for point and volume sources were evaluated in the photon energy range 60-1836 keV by Monte Carlo simulation and experiment. It was found that the calculated peak efficiency curves as a function of energy without modelling of the actual sensitive region of the detector are similar in shape to those measured. The calculated peak efficiencies of the detector having an apparent dead layer (1 mm) were also found to agree with the experimental values (deviations from -10-24%). Consequently, the simulation method for peak efficiencies was validated. In addition, an optimum design for a whole-body counter with Ge semiconductor detectors was examined by simulation. This simulation provides a method to determine an optimum arrangement of detectors in a whole-body counter, offering a uniform response to various 137Cs distributions in a human body.
Related Concept Videos
Gas Chromatography: Overview of Detectors
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
Gas Chromatography: Types of Detectors-I
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
Gas Chromatography: Types of Detectors-II
High-Performance Liquid Chromatography: Types of Detectors

