Comparison of two spectrometric counting modes for fast analysis of selected radionuclides activity

Abstract

The two counting modes: a normal with a single HPGE detector and second with the additional anti-Compton shield of the annular NaI(Tl) detector have been compared for fast determination of the activity concentration of thorium 232Th in the building materials. The 232Th activity concentration was calculated by measurement of its decay products: 212Pb, 212Bi and 208Tl as well 228Ac content. Although the Compton suppression mode applied in gamma spectrometry systems in general increase sensitivity of the analysis, but in case of 583 keV the most abundant 208Tl γ-line, the significant reduction of photon counting rate was observed.

Novel method of ancient pottery analysis based on radioactive isotope ratios: a pilot study

“…The content of certain aluminium silicates containing Al, Si and P was correlated with the concentrations of 238 U and 226 Ra. The content of Th ( 232 Th) correlated with heavy minerals, represented by Ti, V or Cr [34]. In this Fig.…”

“…A Gamma spectrometry system (Canberra) with an active shield can be used for small samples with a mass lower than about 5 g. However, background has been monitored and subtract from measurements each individual samples. In most environmental analysis the primary HPGe detector was enough to provide good quality analyses [32][33][34][35].…”

“…The methodology of radiometric studies of ancient ceramics is based on low-background and high-resolution gamma radiation spectrometry [17,[32][33][34][35]. The basic element of the method is the use of the natural radionuclides occurring in geological materials, including clays.…”

Assessment of the Radiation Situation and the Presence of Heavy Metals in the Soil in the Poleski National Park

“…Pollution in the area of parks is also the result of the impact of nearby roads with high traffic [29,67,68]. Pollution of the soil environment in protected areas may also be caused by intensive agricultural activity resulting from inadequate fertilization or the use of plant protection products [38,[69][70][71][72][73]. Within National Parks, in situ activities, such as environmental overexploitation and tourism, also exert anthropogenic pressure.…”

Estimation of radioactive activity by gamma spectroscopy

“…Prior to any application, each isotope must be associated with a spectrum, so in this work, a group of four synthetic samples and two decay chains of naturally occurring radioactive elements were analyzed. The observed peaks were associated with γ-ray nuclei emissions of the highest absolute intensity with the assistance of nuclear structure databases [11][12][13] and similar references [14,15]. Subsequently, spectroscopy techniques are implemented to determine their corresponding radioactive activities.…”