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Showing 1 to 20 of 1561 for “"irradiation"”.
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Rock differentiation using microwave irradiation
This project arose as a result of inefficiencies in the diamond recovery process at Premier Mine. A considerable amount of barren waste rock, gabbro, is mined along with the diamond bearing kimberlite. No automated method exists for separating the kimberlite from the waste rock and a device was …
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Ore sorting using microwave irradiation
… and kimberlite. A technique using microwave irradiation attenuation was successful when using parallel-sided smooth-surfaced rocks. This technique used linearly polarized square antennas at 35GHz. Problems were experienced, however, with irregu1arly shaped rock s. The aim of the present study …
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Neutron irradiation effects in gallium arsenide
… electrical properties of n-GaAs as a result of irradiations with fast neutrons have been studied, after epitaxial layers doped with Si at concentrations in the range 1.35 $\times$ 10$\sp{15}$ to 1.60 $\times$ 10$\sp{16}$ cm$\sp{-3}$ were irradiated with reactor neutron fluences up to 1.31 …
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Compositional modifications in alloys under irradiation
… and subsurface compositions of alloys during irradiation has been investigated theoretically using a phenomenological model that includes preferential sputtering, displacement mixing, radiation-enhanced diffusion, radiation-induced segregation and Gibbsian adsorption. Sample calculations were …
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Selective irradiation of the vascular endothelium
… using uniform whole-body and selective vascular irradiation techniques. Mice received whole-body epithermal neutron beam irradiation. Additional dose was selectively targeted to endothelial cells from the short-ranged (5-9 [mu]m) particles released from neutron capture reactions in 10B confined …
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Optimizing Weed Management via Microwave Irradiation
One potential alternative to chemical weed control is the use of microwave radiation, a particular form of indirect thermal weeding. Absorption of microwave radiation causes water molecules within the tissue to oscillate, thereby converting electromagnetic energy into heat. This technique is rapid, …
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PROTON IRRADIATION SAMPLE HOLDER II (PISH II)
… to hold samples during proton or alpha particle irradiation. The sample holder controls the temperature of the sample along with monitoring the beam current during experiments. This thesis explores the design and implementation of a new sample holder named PISH II. It improves upon the accuracy …
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Atomistic studies on irradiation damage in iron
Two topics involving irradiation damage in alpha-iron have been considered. First, damage cascades representative of those that would be induced by radiation have been simulated using molecular dynamics (MD). The number and type of defects produced are compared for pure iron and iron with a small …
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Characterizing canine dose from external beam irradiation
Absorbed dose from Computed Tomography (CT) is a major concern on an individual basis as well as for the collective population due to increased frequency of and dependency on CT scans for diagnostic and therapeutic imaging. Colorado State University recently integrated a large bore multi-slice …
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Nanostructure formation on Germanium by ion irradiation
… nanovoids induced by heavy ion and high fluence irradiation at room temperature. This phenomenon can represent a possible way to produce wide nanostructured areas on semiconductor surfaces by a well-established semiconductor technology process such as ion implantation. However, the formation …
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Optimizing graphene oxide reduction via laser irradiation
… step method to reduce graphene oxide via laser irradiation. A computer numerically controlled laser engraver equipped with a 450nm laser diode was engineered to conduct this research. Reduced graphene oxide samples were prepared on a polycarbonate substrate at various laser powers, scan speeds, …
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Novel precipitate structures in alloys under irradiation
… precipitate stability under energetic particle irradiation, towards the goal of better controlling the microstructures of driven alloys. First we focus on an irradiation-induced precipitatewithin- precipitate structure, which is referred to as “cherry-pit” structure. We show by computer …
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Electron-Irradiation of Gold Below 2 K
Made available in DSpace on 2015-05-12T22:38:58Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7405582.PDF: 3165086 bytes, checksum: bea069da8095ee7b92749a594a256594 (MD5) Previous issue date: 1973
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Photoluminescence From Irradiation-Induced Defects in Silicon
Made available in DSpace on 2014-12-10T19:07:20Z (GMT). No. of bitstreams: 1 7500387.pdf: 6075878 bytes, checksum: 2d0b1b65b82e1f881b7cf3cb33cdbea4 (MD5) Previous issue date: 1974
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Electron irradiation of gold below 2 K
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-04-12T22:09:10Z No. of bitstreams: 1 1973_gwozdz.pdf: 3489228 bytes, checksum: 746424fee507372384d7217eec642e23 (MD5)
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Characterization of the Neutron Irradiation System for use in the Low-Dose-Rate Irradiation Facility at Sandia National Laboratories
… of this work was to characterize the neutron irradiation system consisting of americium 241 beryllium (241AmBe) neutron sources placed in a polyethylene shielding for use at Sandia National Laboratories (SNL) Low Dose Rate Irradiation Facility (LDRIF). With a total activity of 0.3 TBq (9 Ci), …
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