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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:24 |
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Conference: Bucharest University Faculty of Physics 2011 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Study of the behavior of the (HPGe) gamma spectrometry system as a tool for low activity measurement
Authors:
Beatris Neacsu*, Aurelian Luca, Maria Sahagia
Affiliation:
Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH)
E-mail
*) Corresponding author: beatris.neacsu@nipne.ro
Keywords:
(HPGe)gamma spectrometry system, low activity measurements, metrology, detection efficiency, minimum detectable activity.
Abstract:
The Radioisotopes and Radiation Metrology Department (DRMR), Laboratory for Testing and Certification of Compliance for Radiopharmaceuticals, Radiochemicals and Radioactive Sources (CPRLAB) within the Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH) tests and certifies the conformity of radiochemical substances, radiopharmaceutical products for diagnosis and treatment, as well as radioactive sources. The radionuclidic analysis requires gamma spectrometry measurements which are performed with a high purity germanium detector (HPGe). In order to ensure the quality of the analysis and the accuracy of the results, the detection system need to be maintained within the optimal running parameters, to be calibrated accordingly, its characteristics be known and the background has to be monitored frequently.
The present work studies the behavior of this gamma spectrometry system in regime of low activity measurements. Thus, we shall present a statistic analysis regarding the monitoring of the laboratory background, its stability and the variations of the main components, the stability of the absorption peaks’ position, the detector efficiency within the region of interest and its periodic calibration. The evolution in time of the minimum detectable activity, as a consequence of the above parameters’ variations will be discussed.
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