Efficiency calibration and summation effects in gamma-ray spectrometry

Producing 65Zn and 60Co gamma sources for energy and efficiency calibration of gamma spectrometry systems

Precise calibration of energy and efficiency of gamma spectrometry systems for different geometries is very important. In most cases, preparation of these sources for educational and research centers  is very difficult due to high costs and lack of access to the reactor. The purpose of this paper is to explain the procedure for production of calibration sources 65Zn and 60Co using instrumental ...

Optimization of measurement counting time in Gamma-ray spectrometry of soil samples

The method of optimal measurement counting time in Gamma spectrometry for soil samples was studied. Gamma spectrometry was done based on minimum detectable activity using the HPGe- p type with efficiency of 30% and FWHM 1.7keV (for 1.33 MeV 60Co). The samples were IAEA-RG Th-1, IAEA-RGU-1 and IAEA-RGK-1 prepared in bottles. The measurements were done for 12 different counting times from 5 min t...

A Comparative Study of Field Gamma-ray Spectrometry by NaI(Tl) and HPGe Detectors in the South Caspian Region

Natural radionuclides present in soil as well as certain anthropogenic radionuclides released to the environment are the major contributors to terrestrial outdoor exposures. In the assessment of human exposures from environmental radioactivity, besides the conventional method of soil and vegetation sampling combined with laboratory based analyses of environmental media, the other choice would b...

ETNA (Efficiency Transfer for Nuclide Activity measurements) Software for efficiency transfer and coincidence summing corrections in gamma-ray spectrometry

Calibration of Gamma-Ray Burst Luminosity Indicators

Several gamma-ray burst (GRB) luminosity indicators have been proposed, which can be generally written in the form of L̂ = c ∏ x ai i , where c is the coefficient, xi is the i-th observable, and ai is its corresponding power-law index. Unlike Type-Ia supernovae, calibration of GRB luminosity indicators using a low-redshift sample is difficult. This is because the GRB rate drops rapidly at low re...