Positron annihilation spectroscopy techniques applied to the study of an HPGe detector

Nascimento, Eduardo do; Vanin, V. R.; Maidana, Nora L.; Silva, Tiago Fiorini da; Rizzutto, M. A.; Fernández-Varea, José M.

doi:10.1063/1.4804096

Cited by 1 publication

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“…ser observado em experimentos em coincidência como aqueles dos trabalhos [66,67], obtidos em nosso grupo de pesquisa.…”

Section: Processos De Produção De Fótonsunclassified

Detetores semicondutores de fótons na investigação das interações dos elétrons e fótons com a matéria

Maidana¹

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Photon detectors play a central role in the quantification of the interactions of photons and electrons with matter, therefore their characterization is necessary for a wide range of experiments and applications. Accurate determination of the efficiency and response of these detectors requires lengthy and costly experiments. The many attempts to reduce the effort spent in this process using simulations with Monte Carlo codes obtained efficiency and response of the detectors that did not reach the required accuracy when not guided by complementary experiments. This work reports the methodologies we developed to obtain the response and efficiency of detectors with good accuracy, combining experiment, simulation and the construction of analytic functions. Both the simulations and the analytical expressions took into account physical parameters, such as crystal dimensions, thicknesses of dead layers and other components of the detector, which were measured, modeled and/or calculated to match, within the experimental uncertainty, the measured efficiency of collimated photon beams. Some of the these studies led to find one detection secondary effect not previously reported in the literature. The characterized detectors were used in several measurements of cross sections of the bremsstrahlung and the ionization of atomic inner shells with the São Paulo Microtron electrons beams, which brought new contributions to the study of the interactions of photons and electrons with matter.

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“…ser observado em experimentos em coincidência como aqueles dos trabalhos [66,67], obtidos em nosso grupo de pesquisa.…”

Section: Processos De Produção De Fótonsunclassified

Detetores semicondutores de fótons na investigação das interações dos elétrons e fótons com a matéria

Maidana¹

View full text Add to dashboard Cite

show abstract

Positron annihilation spectroscopy techniques applied to the study of an HPGe detector

Cited by 1 publication

References 6 publications

Detetores semicondutores de fótons na investigação das interações dos elétrons e fótons com a matéria

Detetores semicondutores de fótons na investigação das interações dos elétrons e fótons com a matéria

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