971 resultados para Hall, Basil, 1788-1844.
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Enseñanza de la Arquitectura en la ETS de Arquitectura de Madrid
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Hay un ejemplar encuadernado con: Bandos divertidísimos contra los borrachos y borrachas, y gente aficionada al vino (NP849.91/3087).
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Texto firmado por, Pedro Francisco de Pueyo
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When linacs operate above 8MV an undesirable neutron field is produced whose spectrum has three main components: the direct spectrum due to those neutrons leaking out from the linac head, the scattered spectrum due to neutrons produced in the head that collides with the nuclei in the head losing energy and the third spectrum due to room-return effect. The third category of spectrum has mainly epithermal and thermal neutrons being constant at any location in the treatment hall. These neutrons induce activation in the linac components, the concrete walls and in the patient body. Here the induced radioisotopes have been identified in concrete samples located in the hall and in one of the wedges. The identification has been carried out using a gamma-ray spectrometer.
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