True coincidence summing correction and mathematical efficiency modeling of a well detector

Well GeHP detector calibration for environmental measurements using reference materials

“…The difference between the correction factor obtained at 1120.29 keV and the TCS factor and the ratio ε ε / exp sim is due to the weak count rate in this line. The correction factors determined in three different ways are in good agreement and are close to those obtained in the literature for the most of values [8,22]. For both lines at 1764.5 keV and 2204.1 keV, there are significant differences compared with the values from the literature.…”

“…For 214 Bi, we have considered height major lines (with the most important intensities) from its numerous γ radiations. We assumed that 226 Ra is in secular equilibrium with its progenies, which implies that they have the same activity, and we have compared the 214 Bi activity with that of 214 Pb, which is free from TCS at 351.9 keV and slightly affected with 1.9% at 295.38 keV [8]. Table 6 shows the TCS correction factors calculated for the major lines of 214 Bi in three different ways: Ratio ε exp / ε sim : that is the ratio between the experimental efficiency and the efficiency calculated from the MCNP6 simulations.…”

“…The detector full energy peak efficiency (FEPE) calibration is always required to reach accurate measurements and still represents a subject of considerable interest for the gamma spectrometry [1][2][3][4][5][6][7][8][9][10]. In this work, the measurements were carried out with a well highpurity germanium (HPGe) detector, situated in the underground Laboratory of Modane (LSM, located along the Frejus Tunnel Rood in Savoy) where the reachable sensitivity depends on the ultra-low background.…”

“…In this work, the measurements were carried out with a well highpurity germanium (HPGe) detector, situated in the underground Laboratory of Modane (LSM, located along the Frejus Tunnel Rood in Savoy) where the reachable sensitivity depends on the ultra-low background. The FEPE calibration of the well detector [1][2][3][4]7,8,10] is required for environmental measurements, mainly the determination of fallout radionuclides in lake sediments such as 210 Pb (half-life 22.3 years) and 137 Cs (half-life 30.05 years) for dating methods. To determine the FEPE function, standard calibration sources, with the same size and composition as the samples, should be used to have the same matrix effects (concerning mainly the auto-absorption due to the density and the chemical composition) that will be corrected.…”

Conceptual design and simulated performance of the Barrel part of gamma array for the experimental terminal at HFRS of HIAF

“…energy depositions from all crystals in the 𝛾 array, which will be called the "add-back-all" algorithm. This is because the 𝛾 array is like a well-type detector where crystals with energy depositions may be far apart [34]. However, for events with more than 2 𝛾-rays emitted simultaneously, this method is invalid.…”