Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"photon spectrum"”.
-
Influence of photospheric back-scatter on flare hard x-ray diagnostics.
… is concerned with the effect of back–scatter photons upon the morphology of the Hard X–Ray photon spectrum and its effect on the inferred parent electron spectrum. I present a theoretical investigation into Compton reflected HXR photons, known as the photospheric Albedo, and explore the effect …
-
Novel designs for undulator based positron sources
… uses a helical undulator to produce a intense photon beam that generates positrons through the pairproduction mechanism. As a helical undulator is used the photon beam is polarised and this results in polarised positrons being produced. This thesis investigates the undulator-based positron …
-
Medical Isotope Production of Actinium 225 By Linear Accelerator Photon Irradiation of Radium 226
… proposes a production method using a high-energy photon spectrum (generated by a linear accelerator or LINAC) to irradiate a sample of Radium-226 (half-life 1600yrs). The photo-neutron reaction liberates neutrons from Ra-226 atoms leaving behind Radium-225 (half-life 14.7 days). Ra-225 decays …
-
Dual neutral particle induced transmutation
… concepts have sought to use neutrons as well as photons for active interrogation of cargo to detect the smuggling of highly enriched uranium -- a concept that would require modeling of the transmutation caused by both neutrons and photons. As photonuclear transmutation has yet to be modeled, new …
-
Characterization of the Neutron Irradiation System for use in the Low-Dose-Rate Irradiation Facility at Sandia National Laboratories
… of varying sensitivities. First, the computed photon radiography assisted in determining orientation of the component sources. With the capsule properly oriented inside the shielding, the neutron spectra were measured using a variety of techniques. A N-probe Microspec and a neutron Bubble …
-
Relativistische Quantendynamik in extrem starken Laserfeldern
Die vorliegende Arbeit beschäftigt sich mit der relativistischen Dynamik einzelner Elektronen in extrem starken Laserfeldern. Zusätzlich zum Einfluß des durch ein klassisches Vektorpotential beschriebenen Laserfeldes wird die Wechselwirkung des Elektrons mit einem oder mehreren hoch geladenen …