Publication: Diseño, construcción y caracterización de un contador proporcional de ángulo sólido definido para la medida absoluta de tasas de emisión de rayos X de baja energía
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2021-05-17
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Universidad Complutense de Madrid
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Abstract
Durante los últimos años, se ha hecho patente que es necesario mejorar las medidas de rayos X de baja energía de las que se dispone hasta la fecha, en particular las medidas de probabilidades de emisión de algunos radionucleidos y de rendimientos de fluorescencia de algunos elementos. Para que las nuevas medidas sean verdaderamente independientes de cualquier medida previa de probabilidades de emisión, es necesario contar con una técnica capaz de medir de manera absoluta tasas de emisión; es decir, que no requiera ser calibrada mediante la medida de una fuente previamente medida por otra técnica. Esto requiere calcular de manera precisa su eficiencia de detección, lo cual hace delos detectores de ionización gaseosa una solución idónea...
Over the past years, it has become clear that it is necessary to improve measurement of low-energy X-rays, especially emission probabilities of some radionuclides and fluorescence yields of some elements. In order for new measurements to be truly independent of any previous measurement of emission probabilities, it is necessary to use a technique that is capable of absolute measurements of emission rates; that is to say, that does not need to be calibrated through the measurement of a source that has been previously calibrated by another technique. This requires the accurate calculation of its detection efficiency, which makes gas-filled detectors a very suitable choice...
Over the past years, it has become clear that it is necessary to improve measurement of low-energy X-rays, especially emission probabilities of some radionuclides and fluorescence yields of some elements. In order for new measurements to be truly independent of any previous measurement of emission probabilities, it is necessary to use a technique that is capable of absolute measurements of emission rates; that is to say, that does not need to be calibrated through the measurement of a source that has been previously calibrated by another technique. This requires the accurate calculation of its detection efficiency, which makes gas-filled detectors a very suitable choice...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 18-12-2020