2009
DOI: 10.1016/j.nima.2009.07.051
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Statistical analysis of the Doppler broadening coincidence spectrum of electron–positron annihilation radiation in silicon

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Cited by 7 publications
(5 citation statements)
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“…A statistical analysis, as performed in previous studies [2,3], of CDBS acquired with and without an electric field applied to the Ge crystal may then provide more detailed information on the phenomena that occur during the lifetime of positrons within the detector crystal and cause the observed changes in the shape of the annihilation peak.…”
Section: Discussionmentioning
confidence: 99%
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“…A statistical analysis, as performed in previous studies [2,3], of CDBS acquired with and without an electric field applied to the Ge crystal may then provide more detailed information on the phenomena that occur during the lifetime of positrons within the detector crystal and cause the observed changes in the shape of the annihilation peak.…”
Section: Discussionmentioning
confidence: 99%
“…The filter was made of a 0.5cm-thick sheet of Pb sandwiched between 5-cm-thick polyethylene layers. Two HPGe detectors, shielded by 10-cm-thick Pb bricks, were positioned facing opposite sides of the target Ge crystal in order to observe the electron-positron annihilation photons that escaped from it and provided, from independent linear amplifier outputs, both the coincidence and singles DBS [1][2][3]. FIGURE 1 shows a sketch of our setup.…”
Section: Methodsmentioning
confidence: 99%
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“…The pile-up effect (overlapping of pulses from two different photons) in the region C can be represented by the exponent with a negative slope [5,10].…”
Section: Methodsmentioning
confidence: 99%
“…para a análise do espectro de coincidência através do ajuste de funções modelos diretamente aos dados experimentais [4,5]. Este método permite detalhar melhor aniquilações com elétrons ligados, já que, quando se analisa apenas o espectro de diferença de energia (perl largo), como é usualmente feito, a informação da energia de ligação é perdida (como pode-se ver na 1.5a).…”
Section: Espectro De Coincidênciaunclassified